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Skype ˈskaɪp is a telecommunications application software that specializes in providing video chat and voice calls from computers, tablets and mobile devices via the Internet to other devices or telephones/smartphones. Users can also send instant messages, exchange files and images, send video messages and create conference calls. Skype is available to download onto computers running Microsoft Windows, Mac or Linux, as well as Android, Blackberry, iOS and Windows Phone smartphones and tablets. Much of the service is free but users require Skype Credit or a subscription to call landline or mobile numbers. Skype is based on a freemium model.

First released in August 2003, Skype was created by Dane Janus Friis and Swede Niklas Zennström in cooperation with Estonians Ahti Heinla, Priit Kasesalu, and Jaan Tallinn, who developed the backend which was also used in music-sharing application Kazaa. In September 2005, eBay acquired Skype for $2.6 billion. In September 2009, Silver Lake, Andreessen Horowitz and the Canada Pension Plan Investment Board announced the acquisition of 65% of Skype for $1.9 billion from eBay, valuing the business at $2.75 billion. Skype was later acquired by Microsoft in May 2011 for $8.5 billion. Microsoft's Skype division headquarters are in Luxembourg, but most of the development team and 44% of the overall employees of the division are still situated in Tallinn and Tartu, Estonia.

Skype allows users to communicate by voice using a microphone, video by using a webcam, and instant messaging over the Internet. Skype-to-Skype calls to other users are free of charge, while calls to landline telephones and mobile phones (over traditional telephone networks) are charged via a debit-based user account system called Skype Credit.

Skype originally featured a hybrid peer-to-peer and client–server system, however since May 2012 Skype is entirely powered by Microsoft-operated supernodeThe 2013 mass surveillance disclosures revealed that Microsoft has granted intelligence agencies unfettered access to supernodes and Skype communication content.

Some network administrators have banned Skype on corporate, government, home and education networks citing reasons such as inappropriate usage of resources, excessive bandwidth usage, and security concerns.

History
Main article: Skype Technologies

Skype was founded in 2003 by Janus Friis from Denmark and Niklas Zennström from Sweden. The Skype software was created by Estonians Ahti Heinla, Priit Kasesalu, and Jaan Tallinn The first public beta version was released on 29 August 2003.

In June 2005, Skype entered into an agreement with the Polish web portal Onet.pl. On 12 September 2005, eBay Inc. agreed to acquire Luxembourg-based Skype Technologies SA for approximately US$2.5 billion in up-front cash and eBay stock, plus potential performance-based consideration.

On 1 September 2009, it was announced that eBay was selling 65% of Skype to Silver Lake, Andreessen Horowitz and the Canada Pension Plan Investment Board for US$1.9 billion, valuing Skype at US$2.75 billion.
Microsoft acquisition

On 10 May 2011, Microsoft Corporation acquired Skype Communications, S.à r.l for US$8.5 billion.The company was incorporated as a division of Microsoft, and Microsoft acquired all of the company's technologies with the purchase. This was completed on 13 October 2011.

Microsoft phased out its long-standing Windows Live Messenger instant messaging service in favour of Skype, although Messenger continues in mainland China.Microsoft began this transition on 8 April 2013, and completed the move by 30 April of the same year.

Features
Main article: Features of Skype

Registered users of Skype are identified by a unique Skype Name, and may be listed in the Skype Skype allows these registered users to communicate through both instant messaging and voice chat. Voice chat allows telephone calls between pairs of users and conference calling, and uses a proprietary audio codec. Skype's text chat client allows group chats, emoticons, storing chat history and editing of previous messages. Offline messages were implemented in a beta of version 5, but removed after a few weeks without notification. The usual features familiar to instant messaging users—user profiles, online status indicators, and so on—are also included.

The Online Number, a.k.a. SkypeIn, service allows Skype users to receive calls on their computers dialed by conventional phone subscribers to a local Skype phone number; local numbers are available for Australia, Belgium, Brazil, Chile, Colombia, Denmark, the Dominican Republic, Estonia, Finland, France, Germany, Hong Kong, Hungary, Ireland, Japan, Mexico, Nepal, New Zealand, Poland, Romania, South Africa, South Korea, Sweden, Switzerland, Turkey, the Netherlands, the United Kingdom, and the United States. A Skype user can have local numbers in any of these countries, with calls to the number charged at the same rate as calls to fixed lines in the country. The countries on this growing list are referred to collectively as the SkypeIn Countries.
Skype supports conference calls, video chats and screen sharing between 25 people at a time for free.

Skype does not provide the ability to call emergency numbers such as 112 in Europe, 911 in North America, 100 Call Police in India and Nepal. However, as of December 2012 there is limited support for emergency calls in the United Kingdom, Australia, Denmark and Finland. The U.S. Federal Communications Commission (FCC) has ruled that, for the purposes of section 255 of the Telecommunications Act, Skype is not an "interconnected VoIP provider". As a result, the U.S. National Emergency Number Association recommends that all VoIP users have an analog line available as a backup.

On 14 July 2011, Skype partnered with Comcast to bring its video chat service to Comcast subscribers via their HDTV sets.
On 17 June 2013, Skype released a free video messaging service which can be operated on Windows and Mac OS, iOS, Android and BlackBerry.
On 12 August 2013, Skype released the 4.10 update to the app for Apple iPhone and iPad that allows HD quality video for iPhone 5 and fourth generation iPads.

On 20 November 2014, Microsoft Office's team announced that a new chat powered by Skype is going to be implemented in their software, giving tools to be able to chat with co-workers in the same document.

Client applications and devices

Skype runs on a number of platforms including Microsoft Windows (XP, Vista, 7, 8), OS X (10.6 or newer), Linux (Ubuntu and others), Android, BlackBerry 10, iOS, and Windows Phone 8.

On 29 October 2007, Skype launched its own mobile phone under the brand name 3 Skypephone, which runs a BREW OS

Skype also offers a Skype Wi-Fi Phone, which is a wireless mobile phone that allows users to make Skype calls, using a wireless Internet connection. The Skype Wi-Fi Phone has an on-screen menu that lets Skype users see who is online and available to talk, similar to what is seen on a PC. It can also be used to talk with non-Skype users. SkypeOut minutes can be used to call any phone for a low price and no monthly fee. The Skype Wi-Fi phone does not contain a web browser and so can not access hotspots that require web-based login or authentication.

Other platforms officially supported include:

    The Nokia N800, N810 and N900 Internet Tablets, which run Maemo
    The Nokia N9, which runs MeeGo, comes with Skype voice calling and text messaging integrated however lacks video-calling.
    Both the Sony mylo COM-1 and COM-2 models
    The PlayStation Portable Slim and Lite series, though the user needs to purchase a specially designed microphone peripheral. The PSP-3000 has a built in microphone, which allows communication without the Skype peripheral.[78] The PSP Go has the ability to use Bluetooth connections with the Skype application, in addition to its built-in microphone.Skype for PlayStation Vita may be downloaded via the PlayStation Network in the U.S. It includes the capability to receive incoming calls with the application running in the background.
    Samsung Smart TV has a Skype app which can be downloaded for free.It uses the built in camera and microphone for the newer models. Alternatively a separate mountable Skype camera with built in speakers and microphones is available to purchase for older models.
    Some devices are made to work with Skype by talking to a desktop Skype client or by embedding Skype software into the device. These are usually either tethered to a PC, or have a built-in Wi-Fi client to allow calling from Wi-Fi hotspots like the Netgear SPH101 Skype Wi-Fi Phone, the SMC WSKP100 Skype Wi-Fi Phone, the Belkin F1PP000GN-SK Wi-Fi Skype Phone, the Panasonic KX-WP1050 Wi-Fi Phone for Skype Executive Travel Set, the IPEVO So-20 Wi-Fi Phone for Skype and the Linksys CIT200 Wi-Fi Phone.

Third-party developers, such as Truphone, Nimbuzz and Fring, previously allowed Skype to run in parallel with several other competing VoIP/IM networks (Truphone and Nimbuzz provide TruphoneOut and NimbuzzOut as a competing paid service) in any Symbian or Java environment. Nimbuzz made Skype available to BlackBerry users and Fring provided mobile video calling over Skype as well as support for the Android platform. Skype disabled Fring users from accessing Skype in July 2010. Nimbuzz discontinued support on request of Skype in October 2010.

Before and during the Microsoft acquisition, Skype withdrew licensing from several third parties producing software and hardware compatible with Skype. The Skype for Asterisk product from Digium was withdrawn as "no longer available for sale". The Senao SN358+ long-range (10–15 km) cordless phone were discontinued due to loss of licenses to participate in the Skype network as peers. In combination these two products made it possible to create roaming cordless mesh networks with robust handoff.
Protocol
Main article: Skype protocol

Skype uses a proprietary Internet telephony (VoIP) network called the Skype protocol. The protocol has not been made publicly available by Skype and official applications using the protocol are closed-source. Part of the Skype technology relies on the Global Index P2P protocol belonging to the Joltid Ltd. corporation. The main difference between Skype and standard VoIP clients is that Skype operates on a peer-to-peer model (originally based on the Kazaa softwar), rather than the more usual client–server model (note that the very popular Session Initiation Protocol (SIP) model of VoIP is also peer-to-peer, but implementation generally requires registration with a server, as does Skype).

As far as networking stack support is concerned, Skype only supports the IPv4 protocol. It lacks support for the next generation Internet protocol, IPv6.
Protocol detection and control

Many networking and security companies claim to detect and control Skype's protocol for enterprise and carrier applications. While the specific detection methods used by these companies are often private, Pearson's chi-squared test and naive Bayes classification are two approaches that were published in 2008. Combining statistical measurements of payload properties (such as byte frequencies and initial byte sequences) as well as flow properties (like packet sizes and packet directions) has also shown to be an effective method for identifying Skype's TCP- and UDP-based protocols.
Audio codecs

G.729 and SVOPC. Skype added a Skype-created codec called SILK to Skype 4.0 for Windows and other Skype clients. SILK is intended to be "lightweight and embeddable". Additionally, Skype has released Opus, and an open source codec which integrates the SILK codec principles for voice transmission with the CELT codec principles for higher quality audio transmissions such as live music performances. Opus was submitted to the Internet Engineering Task Force (IETF) in September 2010. Since then it has been standardized as RFC 6716
Video codecs

VP7 is used for versions prior to Skype 5.5

As of version 5.7 VP8 is used for both group and one on one standard definition video chat and H.264 is used for 720p and 1080p high definition group and one on one video chat

Security and privacy
Main article: Skype security

Skype is claimed initially to be a secure communication, with one of its early web pages stating "highly secure with end-to-end encryption".Security services were invisible to the user, and encryption cannot be disabled. Skype reportedly uses publicly documented, widely trusted encryption techniques: RSA for key negotiation and the Advanced Encryption Standard to encrypt conversations.However, it is impossible to verify that these algorithms are used correctly, completely and at all times as there is no public review possible without a protocol specification and/or the program source code. Skype provides an uncontrolled registration system for users with no proof of identity. Instead, a free choice of nicknames permits users to use the system without revealing their identity to other users. It is trivial to set up an account using any name; the displayed caller's name is no guarantee of authenticity. A third party paper analyzing the security and methodology of Skype was presented at Black Hat Europe 2006. It analyzed Skype and found a number of security issues with the current security model

Skype incorporates some features, which tend to hide its traffic, but it is not specifically designed to thwart traffic analysis and therefore does not provide anonymous communication. Some researchers have been able to watermark the traffic so that it is identifiable even after passing through an anonymizing network.

In an interview Kurt Sauer, the Chief Security Officer of Skype, said, "We provide a safe communication option. I will not tell you whether we can listen or not."This does not deny the fact that NSA monitors Skype conversations. Skype's client uses an undocumented and proprietary protocol. The Free Software Foundation (FSF) is concerned by user privacy issues arising from using proprietary software and protocols and has made a replacement for Skype one of their high priority projects. Security researchers Biondi and Desclaux have speculated that Skype may have a back door, since Skype sends traffic even when it is turned off and because Skype has taken extreme measures to obfuscate their traffic and functioning of their program.[106] Several media sources reported that at a meeting about the "Lawful interception of IP based services" held on 25 June 2008, high-ranking unnamed officials at the Austrian interior ministry said that they could listen in on Skype conversations without problems. Austrian public broadcasting service ORF, citing minutes from the meeting, reported that "the Austrian police are able to listen in on Skype connections". Skype declined to comment on the reports. One easily demonstrated method of monitoring is to set up two computers with the same Skype user ID and password. When a message is typed or a call is received on one computer, the second computer duplicates the audio and text. This requires knowledge of the user ID and password.

The United States Federal Communications Commission (FCC) has interpreted the Communications Assistance for Law Enforcement Act (CALEA) as requiring digital phone networks to allow wiretapping if authorized by an FBI warrant, in the same way as other phone services. In February 2009 Skype said that, not being a telephone company owning phone lines, it is exempt from CALEA and similar laws, which regulate US phone companies, and in fact it is not clear whether Skype could support wiretapping even if it wanted to. According to the ACLU, the Act is inconsistent with the original intent of the Fourth Amendment to the U.S. Constitution; more recently, the ACLU has expressed the concern that the FCC interpretation of the Act is incorrect. It has been suggested that Microsoft made changes to Skype's infrastructure to ease various wiretapping requirements however, Skype denies the claims.

Some time before Skype was sold in 2009, the company had started its own program, called Project Chess, to explore legal and technical ways to easily share calls with intelligence agencies and law enforcement.

On 20 February 2009 the European Union's Eurojust agency announced that the Italian Desk at Eurojust would "play a key role in the coordination and cooperation of the investigations on the use of internet telephony systems (VoIP), such as 'Skype'. ... The purpose of Eurojust’s coordination role is to overcome the technical and judicial obstacles to the intereption of internet telephony systems, taking into account the various data protection rules and civil rights"

In November 2010, a flaw was disclosed to Skype that showed how hackers could secretly track any user's IP address As of 2013, this has still not been fixed.

In 2012, Skype introduced automatic updates to better protect users from security risks, but received some challenge from users of the Mac product, as the updates cannot be disabled from version 5.6 on, both on Mac OS and Windows versions, although in the latter, and only from version 5.9 on, automatic updating can be turned off in certain cases.

According to a 2012 Washington Post article, Skype "has expanded its cooperation with law enforcement authorities to make online chats and other user information available to police"; the article additionally mentions Skype made changes to allow authorities access to addresses and credit card numbers.

In November 2012, Skype was reported to have handed over user data of a pro-Wikileaks activist to Dallas, Texas-based private security company iSIGHT Partners without a warrant or court order. The allegation was an apparent breach of Skype's privacy policy. Skype responded with a statement that it launched an internal investigation to probe the breach of user data privacy.

13 November 2012, a Russian user published a flaw in Skype's security, which allowed any person to take over a Skype account knowing only the victim's email by following 7 steps.This vulnerability was claimed to exist for months, and existed for more than 12 hours since published widely.

14 May 2013, it was documented that a URL sent via a Skype instant messaging session was usurped by the Skype service and subsequently used in a HTTP HEAD query originating from an IP address registered to Microsoft in Redmond (the IP address used was 65.52.100.214). The Microsoft query used the full URL supplied in the IM conversation, and was generated by a previously undocumented security service. Security experts speculate the action was triggered by a technology similar to Microsoft's SmartScreen Filter used in its browsers.

The 2013 mass surveillance disclosures revealed that agencies such as the NSA and the FBI have the ability to eavesdrop on Skype, including the monitoring and storage of text and video calls and file transfers. The PRISM surveillance program, which requires FISA court authorization, reportedly has allowed the NSA unfettered access to its data center supernodes. According to the leaked documents, integration work began in November 2010, but it was not until February 2011 that the company was served with a directive to comply signed by the attorney general, with NSA documents showing that collection began on 31 March 2011.

On November 4, 2014, Skype scored 2 out of 7 points on the Electronic Frontier Foundation's secure messaging scorecard. It lost points because users can't verify contacts' identities, past messages are not secure if the encryption keys are stolen, the code is not open to independent review, the security design is not properly documented, and there has not been a recent independent code audit. On November 10, 2014, Skype lost yet another point because communications are not encrypted with a key the provider doesn't have access to.

Prehistory of Anatolia and Eastern Thrace
Main articles: Prehistory of Anatolia and Prehistory of the Balkans
See also: Ancient Anatolians, Ancient kingdoms of Anatolia and Thracians
The Lion Gate at Hattusa, capital of the Hittite Empire. The city's history dates back to the 6th millennium BC.

The Anatolian peninsula, comprising most of modern Turkey, is one of the oldest permanently settled regions in the world. Various ancient Anatolian populations have lived in Anatolia, beginning with the Neolithic period until conquest of Alexander the Great.Many of these peoples spoke the Anatolian languages, a branch of the larger Indo-European language family. In fact, given the antiquity of the Indo-European Hittite and Luwian languages, some scholars have proposed Anatolia as the hypothetical center from which the Indo-European languages radiated. The European part of Turkey, called Eastern Thrace, has also been inhabited since forty thousand years ago, and is known to have been in the Neolithic era by about 6000 B.C. with its inhabitants starting the practice of agriculture.

Göbekli Tepe is the site of the oldest known man-made religious structure, a temple dating to 10,000 BC, while Çatalhöyük is a very large Neolithic and Chalcolithic settlement in southern Anatolia, which existed from approximately 7500 BCE to 5700 BCE. It is the largest and best-preserved Neolithic site found to date and in July 2012 was inscribed as a UNESCO World Heritage Site.The settlement of Troy started in the Neolithic Age and continued into the Iron Age.

The earliest recorded inhabitants of Anatolia were the Hattians and Hurrians, non-Indo-European peoples who inhabited central and eastern Anatolia, respectively, as early as ca. 2300 BC. Indo-European Hittites came to Anatolia and gradually absorbed the Hattians and Hurrians ca. 2000–1700 BC. The first major empire in the area was founded by the Hittites, from the 18th through the 13th century BC. The Assyrians conquered and settled parts of southeastern Turkey as early as 1950 BC until the year 612 BC. Urartu re-emerged in Assyrian inscriptions in the 9th century BC as a powerful northern rival of Assyria.

Following the collapse of the Hittite empire c. 1180 BC, the Phrygians, an Indo-European people, achieved ascendancy in Anatolia until their kingdom was destroyed by the Cimmerians in the 7th century BC. Starting from 714 BC, Urartu shared the same fate and dissolved in 590 BC. The most powerful of Phrygia's successor states were Lydia, Caria and Lycia.
Antiquity and Byzantine Period
Main articles: Classical Anatolia and Byzantine Anatolia
See also: Byzantine Empire, Constantinople and Odrysian kingdom
Originally a church, later a mosque, and now a museum, the Hagia Sophia was built by the Byzantines in the 6th century.

Starting around 1200 BC, the coast of Anatolia was heavily settled by Aeolian and Ionian Greeks. Numerous important cities were founded by these colonists, such as Miletus, Ephesus, Smyrna and Byzantium, the latter founded by Greek colonists from Megara in 657 BC. The first state that was called Armenia by neighbouring peoples was the state of the Armenian Orontid dynasty, which included parts of eastern Turkey beginning in the 6th century BC. In Northwest Turkey, the most significant tribal group in Thrace was the Odyrisians, founded by Teres I.

Anatolia was conquered by the Persian Achaemenid Empire during the 6th and 5th centuries BC and later fell to Alexander the Great in 334 BC, which led to increasing cultural homogeneity and Hellenization in the area. Following Alexander's death in 323 BC, Anatolia was subsequently divided into a number of small Hellenistic kingdoms, all of which became part of the Roman Republic by the mid-1st century BC. The process of Hellenization that began with Alexander's conquest accelerated under Roman rule, and by the early centuries AD the local Anatolian languages and cultures had become extinct, being largely replaced by ancient Greek language and culture.

In 324, Constantine I chose Byzantium to be the new capital of the Roman Empire, renaming it New Rome. Following the death of Theodosius I in 395 and the permanent division of the Roman Empire between his two sons, the city, which would popularly come to be known as Constantinople became the capital of the Eastern Roman Empire. This, which would later be branded by historians as the Byzantine Empire, ruled most of the territory of what is today Turkey until the Late Middle Ages.
The Seljuks and the Ottoman Empire
Main articles: Seljuk dynasty and Ottoman dynasty
See also: Turkic migration, Turkification, Seljuk Empire, Sultanate of Rum and Ottoman Empire
Mevlana Museum in Konya was built by the Seljuk Turks in 1274. Konya was the capital of the Sultanate of Rum.

The House of Seljuk was a branch of the Kınık Oğuz Turks who resided on the periphery of the Muslim world, in the Yabghu Khaganate of the Oğuz confederacy, to the north of the Caspian and Aral Seas, in the 9th century. In the 10th century, the Seljuks started migrating from their ancestral homeland into Persia, which became the administrative core of the Great Seljuk Empire.

In the latter half of the 11th century, the Seljuks began penetrating into the eastern regions of Anatolia. In 1071, the Seljuk Turks defeated the Byzantines at the Battle of Manzikert, starting Turkification of the area; the Turkish language and Islam were introduced to Anatolia and gradually spread over the region and the slow transition from a predominantly Christian and Greek-speaking Anatolia to a predominantly Muslim and Turkish-speaking one was underway.

In 1243, the Seljuk armies were defeated by the Mongols, causing the Seljuk Empire's power to slowly disintegrate. In its wake, one of the Turkish principalities governed by Osman I would, over the next 200 years, evolve into the Ottoman Empire, expanding throughout Anatolia, the Balkans, the Levant and North Africa. In 1453, the Ottomans completed their conquest of the Byzantine Empire by capturing its capital, Constantinople.
Topkapı and Dolmabahçe palaces were the primary residences of the Ottoman Sultans and the administrative center of the empire between 1465 to 1856 and 1856 to 1922, respectively.

In 1514, Sultan Selim I (1512–1520) successfully expanded the Empire's southern and eastern borders by defeating Shah Ismail I of the Safavid dynasty in the Battle of Chaldiran. In 1517, Selim I expanded Ottoman rule into Algeria and Egypt, and created a naval presence in the Red Sea. Subsequently, a competition started between the Ottoman and Portuguese empires to become the dominant sea power in the Indian Ocean, with a number of naval battles in the Red Sea, the Arabian Sea and the Persian Gulf. The Portuguese presence in the Indian Ocean was perceived as a threat for the Ottoman monopoly over the ancient trading routes between East Asia and Western Europe (later collectively named the Silk Road). This important monopoly was increasingly compromised following the discovery of a sea route around Africa by Portuguese explorer Bartolomeu Dias in 1488, which had a considerable impact on the Ottoman economy.

The Ottoman Empire's power and prestige peaked in the 16th and 17th centuries, particularly during the reign of Suleiman the Magnificent. The empire was often at odds with the Holy Roman Empire in its steady advance towards Central Europe through the Balkans and the southern part of the Polish-Lithuanian Commonwealth. At sea, the Ottoman Navy contended with several Holy Leagues (composed primarily of Habsburg Spain, the Republic of Genoa, the Republic of Venice, the Knights of St. John, the Papal States, the Grand Duchy of Tuscany and the Duchy of Savoy) for control of the Mediterranean Sea. In the east, the Ottomans were occasionally at war with Safavid Persia over conflicts stemming from territorial disputes or religious differences between the 16th and 18th centuries.

From the beginning of the 19th century onwards, the Ottoman Empire began to decline. As it gradually shrank in size, military power and wealth, many Balkan Muslims migrated to the Empire's heartland in Anatolia, along with the Circassians fleeing the Russian conquest of the Caucasus. The decline of the Ottoman Empire led to a rise in nationalist sentiment among the various subject peoples, leading to increased ethnic tensions which occasionally burst into violence, such as the Hamidian massacres of Armenians.

The Ottoman Empire entered World War I on the side of the Central Powers and was ultimately defeated. During the war, the empire's Armenians were deported from Eastern Anatolia to Syria as part of the Armenian Genocide. As a result, an estimated 1,500,000 Armenians were killed. The Turkish government denies that there was an Armenian Genocide and claims that Armenians were only relocated from the eastern war zone. Large-scale massacres were also committed against the empire's other minority groups such as the Greeks and Assyrians. Following the Armistice of Mudros on 30 October 1918, the victorious Allied Powers sought to partition the Ottoman state through the 1920 Treaty of Sèvres.
Republic of Turkey
Main article: History of the Republic of Turkey
See also: Atatürk's Reforms
Mustafa Kemal Atatürk, founder and first President of the Republic of Turkey.

The occupation of Constantinople and Smyrna by the Allies in the aftermath of World War I prompted the establishment of the Turkish National Movement. Under the leadership of Mustafa Kemal Pasha, a military commander who had distinguished himself during the Battle of Gallipoli, the Turkish War of Independence was waged with the aim of revoking the terms of the Treaty of Sèvres.

By 18 September 1922, the occupying armies were expelled, and the Ankara-based Turkish regime, which declared itself the legitimate government of the country in April 1920, started to formalize the legal transition from the old Ottoman into the new Republican political system. On 1 November, the newly founded parliament formally abolished the Sultanate, thus ending 623 years of monarchical Ottoman rule. The Treaty of Lausanne of 24 July 1923 led to the international recognition of the sovereignty of the newly formed "Republic of Turkey" as the continuing state of the Ottoman Empire, and the republic was officially proclaimed on 29 October 1923 in Ankara, the country's new capital.The Lausanne treaty stipulated a population exchange between Greece and Turkey, whereby 1.1 million Greeks left Turkey for Greece in exchange for 380,000 Muslims transferred from Greece to Turkey.

Mustafa Kemal became the republic's first President and subsequently introduced many radical reforms with the aim of transforming the old Ottoman-Turkish state into a new secular republic. With the Surname Law of 1934, the Turkish Parliament bestowed upon Mustafa Kemal the honorific surname "Atatürk" (Father of the Turks).

Turkey remained neutral during most of World War II, but entered the closing stages of the war on the side of the Allies on 23 February 1945. On 26 June 1945, Turkey became a charter member of the United Nations. Difficulties faced by Greece after the war in quelling a communist rebellion, along with demands by the Soviet Union for military bases in the Turkish Straits, prompted the United States to declare the Truman Doctrine in 1947. The doctrine enunciated American intentions to guarantee the security of Turkey and Greece, and resulted in large-scale U.S. military and economic support. Both countries were included in the Marshall Plan and OEEC for rebuilding European economies in 1948, and subsequently became founding members of the OECD in 1961.

After participating with the United Nations forces in the Korean War, Turkey joined NATO in 1952, becoming a bulwark against Soviet expansion into the Mediterranean. Following a decade of Cypriot intercommunal violence and the coup in Cyprus on 15 July 1974 staged by the EOKA B paramilitary organization, which overthrew President Makarios and installed the pro-Enosis (union with Greece) Nikos Sampson as dictator, Turkey invaded Cyprus on 20 July 1974. Nine years later the Turkish Republic of Northern Cyprus, which is recognized only by Turkey, was established.

The single-party period ended in 1945. It was followed by a tumultuous transition to multiparty democracy over the next few decades, which was interrupted by military coups d'état in 1960, 1971, and 1980, as well as a military memorandum in 1997. In 1984, the PKK, a Kurdish separatist group, began an insurgency campaign against the Turkish government, which to date has claimed over 40,000 lives. Peace talks are ongoing. Since the liberalization of the Turkish economy during the 1980s, the country has enjoyed stronger economic growth and greater political stability. In 2013, widespread protests erupted in many Turkish provinces, sparked by a plan to demolish Gezi Park but growing into general anti-government dissent.
Administrative divisions
Further information: Regions of Turkey, Provinces of Turkey, Districts of Turkey and NUTS of Turkey

Turkey has a unitary structure in terms of administration and this aspect is one of the most important factors shaping the Turkish public administration. When three powers (executive, legislature and judiciary) are taken into account as the main functions of the state, local administrations do not have almost any power. In other words, there are not units called "states" in Turkey and the provinces and cities come after the central administration. Local administrations were established to provide services in place and the government is represented by the governors and city governors. Besides the governors and the city governors, other senior public officials are also appointed by the central government rather than to be appointed by mayors or elected by constituents.

Turkey is subdivided into 81 provinces for administrative purposes. Each province is divided into districts, for a total of 923 districts.

Turkey is also subdivided into 7 regions and 21 subregions for geographic, demographic and economic purposes; this does not refer to an administrative division.
Ankara

Turkey is a parliamentary representative democracy. Since its foundation as a republic in 1923, Turkey has developed a strong tradition of secularism. Turkey's constitution governs the legal framework of the country. It sets out the main principles of government and establishes Turkey as a unitary centralized state. The President of the Republic is the head of state and has a largely ceremonial role. The president is elected for a five-year term by direct elections and Recep Tayyip Erdoğan is first president elected by direct voting.

Executive power is exercised by the Prime Minister and the Council of Ministers which make up the government, while the legislative power is vested in the unicameral parliament, the Grand National Assembly of Turkey. The judiciary is independent of the executive and the legislature, and the Constitutional Court is charged with ruling on the conformity of laws and decrees with the constitution. The Council of State is the tribunal of last resort for administrative cases, and the High Court of Appeals for all others.

The prime minister is elected by the parliament through a vote of confidence in the government and is most often the head of the party having the most seats in parliament. The prime minister is Ahmet Davutoğlu who is also the leader of the Justice and Development Party (AKP) since 27 August 2014.

Universal suffrage for both sexes has been applied throughout Turkey since 1933, and every Turkish citizen who has turned 18 years of age has the right to vote. There are 550 members of parliament who are elected for a four-year term by a party-list proportional representation system from 85 electoral districts. The Constitutional Court can strip the public financing of political parties that it deems anti-secular or separatist, or ban their existence altogether. The electoral threshold is 10% of the votes.

Supporters of Atatürk's reforms are called Kemalists, as distinguished from Islamists, representing two extremes on a continuum of beliefs about the proper role of religion in public life. The Kemalist position generally combines a kind of democracy with a laicist constitution and westernised secular lifestyle, while supporting state intervention in the economy, education, and other public services. Since the 1980s, a rise in income inequality and class distinction has given rise to Islamic populism, a movement that in theory supports obligation to authority, communal solidarity and social justice, though what that entails in practice is often contested.

Human rights in Turkey have been the subject of some controversy and international condemnation. Between 1998 and 2008 the European Court of Human Rights made more than 1,600 judgements against Turkey for human rights violations, particularly regarding the right to life, and freedom from torture. Other issues, such as Kurdish rights, women's rights, and press freedom, have also attracted controversy. Turkey's human rights record continues to be a significant obstacle to future membership of the EU. According to the Committee to Protect Journalists, the AKP government has waged one of the world's biggest crackdowns on press freedoms. A large number of journalists have been arrested using charges of "terrorism" and "anti-state activities" such as the Ergenekon and Balyoz cases, while thousands have been investigated on charges such as "denigrating Turkishness" or "insulting Islam" in an effort to sow self-censorship.In 2012, the CPJ identified 76 jailed journalists in Turkey, including 61 directly held for their published work, more than in Iran, Eritrea or China. A former U.S. State Department spokesman, Philip J. Crowley, said that the United States had "broad concerns about trends involving intimidation of journalists in Turkey."
Law
Main articles: Judicial system of Turkey and Law enforcement in Turkey

Turkey has a legal system which has been wholly integrated with the system of continental Europe. For instance, the Turkish Civil Law has been modified by incorporating elements mainly of the Swiss Civil Code, the Code of Obligations and the German Commercial Code. The Administrative Law bears similarities with its French counterpart, and the Penal Code with its Italian counterpart.

Turkey has adopted the principle of the separation of powers. In line with this principle, judicial power is exercised by independent courts on behalf of the Turkish nation. The independence and organization of the courts, the security of the tenure of judges and public prosecutors, the profession of judges and prosecutors, the supervision of judges and public prosecutors, the military courts and their organization, and the powers and duties of the high courts are regulated by the Turkish Constitution.

According to Article 142 of the Turkish Constitution, the organization, duties and jurisdiction of the courts, their functions and the trial procedures are regulated by law. In line with the aforementioned article of the Turkish Constitution and related laws, the court system in Turkey can be classified under three main categories; which are the Judicial Courts, Administrative Courts and Military Courts. Each category includes first instance courts and high courts. In addition, the Court of Jurisdictional Disputes rules on cases that cannot be classified readily as falling within the purview of one court system.

Law enforcement in Turkey is carried out by several departments (such as the General Directorate of Security and Gendarmerie General Command) and agencies, all acting under the command of the Prime Minister of Turkey or mostly the Minister of Internal Affairs. According to figures released by the Justice Ministry, there are 100,000 people in Turkish prisons as of November 2008, a doubling since 2000.
Foreign relations
Main article: Foreign relations of Turkey
After becoming one of the first members of the Council of Europe in 1949, Turkey became an associate member of the EEC in 1963, joined the EU Customs Union in 1995 and started full membership negotiations with the European Union in 2005.

Turkey is a founding member of the United Nations (1945), the OECD (1961), the OIC (1969), the OSCE (1973), the ECO (1985),the BSEC (1992), the D-8 (1997) and the G-20 major economies (1999). Turkey was a member of the United Nations Security Council in 1951–1952, 1954–1955, 1961 and 2009-2010. In September 2013, Turkey became a member of the Asia Cooperation Dialogue (ACD).

In line with its traditional Western orientation, relations with Europe have always been a central part of Turkish foreign policy. Turkey became one of the first members of the Council of Europe in 1949, applied for associate membership of the EEC (predecessor of the European Union) in 1959 and became an associate member in 1963. After decades of political negotiations, Turkey applied for full membership of the EEC in 1987, became an associate member of the Western European Union in 1992, joined the EU Customs Union in 1995 and has been in formal accession negotiations with the EU since 2005. Today, EU membership is considered as a state policy and a strategic target by Turkey. Turkey's support for Northern Cyprus in the Cyprus dispute complicates Turkey's relations with the EU and remains a major stumbling block to the country's EU accession bid.

The other defining aspect of Turkey's foreign policy is the country's strategic alliance with the United States. The common threat posed by the Soviet Union during the Cold War led to Turkey's membership of NATO in 1952, ensuring close bilateral relations with Washington. Subsequently Turkey benefited from the United States' political, economic and diplomatic support, including in key issues such as the country's bid to join the European Union. In the post–Cold War environment, Turkey's geostrategic importance shifted towards its proximity to the Middle East, the Caucasus and the Balkans.

The independence of the Turkic states of the Soviet Union in 1991, with which Turkey shares a common cultural and linguistic heritage, allowed Turkey to extend its economic and political relations deep into Central Asia, thus enabling the completion of a multi-billion-dollar oil and natural gas pipeline from Baku in Azerbaijan to the port of Ceyhan in Turkey. The Baku–Tbilisi–Ceyhan pipeline forms part of Turkey's foreign policy strategy to become an energy conduit to the West. However Turkey's border with Armenia, a state in the Caucasus, was closed by Turkey in support of Azerbaijan during the Nagorno-Karabakh War and remains closed.

Under the AK Party government, Turkey's influence has grown in the formerly Ottoman territories of the Middle East and the Balkans, based on the "strategic depth" doctrine (a terminology that was coined by Ahmet Davutoğlu for defining Turkey's increased engagement in regional foreign policy issues), also called Neo-Ottomanism. Following the Arab Spring in December 2010 and the choices made by the AK Party for supporting certain political opposition groups in the affected countries, this policy has led to tensions with some Arab states, such as Turkey's neighbour Syria since the start of the Syrian civil war, and with Egypt after the ousting of President Mohamed Morsi. As of 2014, Turkey doesn't have an ambassador in Syria, Egypt and Israel (diplomatic relations with the latter country were severed after its bombing raids on the Gaza Strip.) This has left Turkey with few allies in the East Mediterranean (where rich natural gas fields have recently been discovered), and is in sharp contrast with the original goals that were set by the Foreign Minister (currently Prime Minister) Ahmet Davutoğlu in his "zero problems with neighbours" foreign policy doctrine.

Turkey has maintained forces in international missions under the United Nations and NATO since 1950, including peacekeeping missions in Somalia and former Yugoslavia, and support to coalition forces in the First Gulf War. Turkey maintains 36,000 troops in Northern Cyprus, though their presence is controversial,[132] and assists Iraqi Kurdistan with security. Turkey has had troops deployed in Afghanistan as part of the United States stabilization force and the UN-authorized, NATO-commanded International Security Assistance Force (ISAF) since 2001.Since 2003, Turkey contributes military personnel to Eurocorps and takes part in the EU Battlegroups.
Military
Main article: Turkish Armed Forces
See also: Defense industry of Turkey
The Turkish Armed Forces collectively rank as the second largest standing military force in NATO, after the U.S. Armed Forces. Turkey joined the alliance in 1952.

The Turkish Armed Forces consists of the Land Forces, the Naval Forces and the Air Force. The Gendarmerie and the Coast Guard operate as parts of the Ministry of Internal Affairs in peacetime, although they are subordinated to the Army and Navy Commands respectively in wartime, during which they have both internal law enforcement and military functions.

The Chief of the General Staff is appointed by the President and is responsible to the Prime Minister. The Council of Ministers is responsible to the Parliament for matters of national security and the adequate preparation of the armed forces to defend the country. However, the authority to declare war and to deploy the Turkish Armed Forces to foreign countries or to allow foreign armed forces to be stationed in Turkey rests solely with the Parliament.

Turkey has the second largest standing armed force in NATO, after the US Armed Forces, with an estimated strength of 495,000 deployable forces, according to a 2011 NATO estimate.Turkey is one of five NATO member states which are part of the nuclear sharing policy of the alliance, together with Belgium, Germany, Italy, and the Netherlands.A total of 90 B61 nuclear bombs are hosted at the Incirlik Air Base, 40 of which are allocated for use by the Turkish Air Force in case of a nuclear conflict, but their use requires the approval of NATO.

Every fit male Turkish citizen otherwise not barred is required to serve in the military for a period ranging from three weeks to a year, dependent on education and job location. Turkey does not recognise conscientious objection and does not offer a civilian alternative to military service.
Geography
Main article: Geography of Turkey
Topographic map of Turkey

Turkey is a transcontinental Eurasian country. Asian Turkey, which includes 97% of the country, is separated from European Turkey by the Bosphorus, the Sea of Marmara, and the Dardanelles. European Turkey comprises 3% of the country.

The territory of Turkey is more than 1,600 kilometres (1,000 mi) long and 800 km (500 mi) wide, with a roughly rectangular shape. It lies between latitudes 35° and 43° N, and longitudes 25° and 45° E. Turkey's area, including lakes, occupies 783,562 square kilometres (300,948 sq mi), of which 755,688 square kilometres (291,773 sq mi) are in Southwest Asia and 23,764 square kilometres (9,174 sq mi) in Europe. Turkey is the world's 37th-largest country in terms of area. The country is encircled by seas on three sides: the Aegean Sea to the west, the Black Sea to the north and the Mediterranean to the south. Turkey also contains the Sea of Marmara in the northwest.

The European section of Turkey, East Thrace, forms the borders of Turkey with Greece and Bulgaria. The Asian part of the country, Anatolia, consists of a high central plateau with narrow coastal plains, between the Köroğlu and Pontic mountain ranges to the north and the Taurus Mountains to the south. Eastern Turkey has a more mountainous landscape and is home to the sources of rivers such as the Euphrates, Tigris and Aras, and contains Mount Ararat, Turkey's highest point at 5,137 metres (16,854 ft), and Lake Van, the largest lake in the country.

Turkey is divided into seven census regions: Marmara, Aegean, Black Sea, Central Anatolia, Eastern Anatolia, Southeastern Anatolia and the Mediterranean. The uneven north Anatolian terrain running along the Black Sea resembles a long, narrow belt. This region comprises approximately one-sixth of Turkey's total land area. As a general trend, the inland Anatolian plateau becomes increasingly rugged as it progresses eastward.

Turkey's varied landscapes are the product of complex earth movements that have shaped the region over thousands of years and still manifest themselves in fairly frequent earthquakes and occasional volcanic eruptions. The Bosphorus and the Dardanelles owe their existence to the fault lines running through Turkey that led to the creation of the Black Sea. There is an earthquake fault line across the north of the country from west to east, along which a major earthquake occurred in 1999.

ouTube is a video-sharing website headquartered in San Bruno, California. The service was created by three former PayPal employees in February 2005. In November 2006, it was bought by Google for US$1.65 billion. YouTube now operates as a Google subsidiary. The site allows users to upload, view, and share videos, and it makes use of Adobe Flash Video and HTML5 technology to display a wide variety of user-generated and corporate media video. Available content includes video clips, TV clips, music videos, and other content such as video blogging, short original videos, and educational videos.

Most of the content on YouTube has been uploaded by individuals, but media corporations including CBS, the BBC, Vevo, Hulu, and other organizations offer some of their material via YouTube, as part of the YouTube partnership program.Unregistered users can watch videos, and registered users can upload videos to their channels. Videos considered to contain potentially offensive content are available only to registered users affirming themselves to be at least 18 years old.

Company history
Main article: History of YouTube
From left to right: Chad Hurley, Steve Chen, and Jawed Karim
YouTube was founded by Chad Hurley, Steve Chen and Jawed Karim, who were all early employees of PayPal. Hurley had studied design at Indiana University of Pennsylvania, and Chen and Karim studied computer science together at the University of Illinois at Urbana-Champaign.
According to a story that has often been repeated in the media, Hurley and Chen developed the idea for YouTube during the early months of 2005, after they had experienced difficulty sharing videos that had been shot at a dinner party at Chen's apartment in San Francisco. Karim did not attend the party and denied that it had occurred, but Chen commented that the idea that YouTube was founded after a dinner party "was probably very strengthened by marketing ideas around creating a story that was very digestible".

Karim said the inspiration for YouTube first came from Janet Jackson's role in the 2004 Super Bowl incident, when her breast was exposed during her performance, and later from the 2004 Indian Ocean tsunami. Karim could not easily find video clips of either event online, which led to the idea of a video sharing site. Hurley and Chen said that the original idea for YouTube was a video version of an online dating service, and had been influenced by the website Hot or Not.
YouTube began as a venture-funded technology startup, primarily from a $11.5 million investment by Sequoia Capital between November 2005 and April 2006. YouTube's early headquarters were situated above a pizzeria and Japanese restaurant in San Mateo, California. The domain name www.youtube.com was activated on February 14, 2005, and the website was developed over the subsequent months.

The first YouTube video was entitled Me at the zoo, and shows co-founder Jawed Karim at the San Diego Zoo.The video was uploaded on April 23, 2005, and can still be viewed on the site.

YouTube offered the public a beta test of the site in May 2005, six months before the official launch in November 2005. The site grew rapidly, and in July 2006 the company announced that more than 65,000 new videos were being uploaded every day, and that the site was receiving 100 million video views per day.According to data published by market research company comScore, YouTube is the dominant provider of online video in the United States, with a market share of around 43% and more than 14 billion views of videos in May 2010.

YouTube says that 300 hours of new videos are uploaded to the site every minute, three times more than one year earlier and that around three quarters of the material comes from outside the U.S. The site has 800 million unique users a month. It is estimated that in 2007 YouTube consumed as much bandwidth as the entire Internet in 2000. Alexa ranks YouTube as the third most visited website on the Internet, behind Google and Facebook.

The choice of the name www.youtube.com led to problems for a similarly named website, www.utube.com. The site's owner, Universal Tube & Rollform Equipment, filed a lawsuit against YouTube in November 2006 after being regularly overloaded by people looking for YouTube. Universal Tube has since changed the name of its website to www.utubeonline.com.

In October 2006, Google Inc. announced that it had acquired YouTube for $1.65 billion in Google stock, and the deal was finalized on November 13, 2006.

Google does not provide detailed figures for YouTube's running costs, and YouTube's revenues in 2007 were noted as "not material" in a regulatory filing. In June 2008, a Forbes magazine article projected the 2008 revenue at $200 million, noting progress in advertising sale. In January 2012, it was estimated that visitors to YouTube spent an average of 15 minutes a day on the site, in contrast to the four or five hours a day spent by a typical U.S. citizen watching television.

YouTube entered into a marketing and advertising partnership with NBC in June 2006. In November 2008, YouTube reached an agreement with MGM, Lions Gate Entertainment, and CBS, allowing the companies to post full-length films and television episodes on the site, accompanied by advertisements in a section for US viewers called "Shows". The move was intended to create competition with websites such as Hulu, which features material from NBC, Fox, and Disney. In November 2009, YouTube launched a version of "Shows" available to UK viewers, offering around 4,000 full-length shows from more than 60 partners.[36] In January 2010, YouTube introduced an online film rentals service, which is available only to users in the US, Canada and the UK as of 2010. The service offers over 6,000 films.
YouTube's headquarters as of 2010 in San Bruno, California.

In March 2010, YouTube began free streaming of certain content, including 60 cricket matches of the Indian Premier League. According to YouTube, this was the first worldwide free online broadcast of a major sporting event.

On March 31, 2010, the YouTube website launched a new design, with the aim of simplifying the interface and increasing the time users spend on the site. Google product manager Shiva Rajaraman commented: "We really felt like we needed to step back and remove the clutter." In May 2010, it was reported that YouTube was serving more than two billion videos a day, which it described as "nearly double the prime-time audience of all three major US television networks combined". In May 2011, YouTube reported in its company blog that the site was receiving more than three billion views per day.In January 2012, YouTube stated that the figure had increased to four billion videos streamed per day.

In October 2010, Hurley announced that he would be stepping down as chief executive officer of YouTube to take an advisory role, and that Salar Kamangar would take over as head of the company.[44]

In April 2011, James Zern, a YouTube software engineer, revealed that 30% of videos accounted for 99% of views on the site.

In November 2011, the Google+ social networking site was integrated directly with YouTube and the Chrome web browser, allowing YouTube videos to be viewed from within the Google+ interface.[46] In December 2011, YouTube launched a new version of the site interface, with the video channels displayed in a central column on the home page, similar to the news feeds of social networking sites. At the same time, a new version of the YouTube logo was introduced with a darker shade of red, the first change in design since October 2006.

In May 2013, YouTube launched a pilot program to begin offering some content providers the ability to charge $0.99 per month or more for certain channels, but the vast majority of its videos would remain free to view.
Features
Video technology
Playback

Viewing YouTube videos on a personal computer needs the Adobe Flash Player plug-in to be installed on the browser.

In January 2010, YouTube launched an experimental version of the site that uses the built-in multimedia capabilities of web browsers supporting the HTML5 standard.This allows videos to be viewed without requiring Adobe Flash Player or any other plug-in to be installed. The YouTube site has a page that allows supported browsers to opt into the HTML5 trial. Only browsers that support HTML5 Video using the H.264 or WebM formats can play the videos, and not all videos on the site are available.

YouTube experimented with Dynamic Adaptive Streaming over HTTP (MPEG-DASH), which is an adaptive bit-rate HTTP-based streaming solution optimizing the bitrate and quality for the available network. Currently they are using Adobe Dynamic Streaming for Flash.
Uploading

All YouTube users can upload videos up to 15 minutes each in duration. Users who have a good track record of complying with the site's Community Guidelines may be offered the ability to upload videos up to 12 hours in length, which requires verifying the account, normally through a mobile phone.[59] When YouTube was launched in 2005, it was possible to upload long videos, but a ten-minute limit was introduced in March 2006 after YouTube found that the majority of videos exceeding this length were unauthorized uploads of television shows and films.[60][61] The 10-minute limit was increased to 15 minutes in July 2010. If an up-to-date browser version is used, videos greater than 20 GB can be uploaded.

YouTube accepts videos uploaded in most container formats, including .AVI, .MKV, .MOV, .MP4, DivX, .FLV, and .ogg and .ogv. These include video formats such as MPEG-4, MPEG, VOB, and .WMV. It also supports 3GP, allowing videos to be uploaded from mobile phones. Videos with progressive scanning or interlaced scanning can be uploaded, but for the best video quality, YouTube suggests interlaced videos be deinterlaced before uploading. All the video formats on YouTube use progressive scanning.
Quality and formats

YouTube originally offered videos at only one quality level, displayed at a resolution of 320x240 pixels using the Sorenson Spark codec (a variant of H.263),[66][67] with mono MP3 audio.[68] In June 2007, YouTube added an option to watch videos in 3GP format on mobile phones. In March 2008, a high quality mode was added, which increased the resolution to 480x360 pixels.

In November 2008, 720p HD support was added. At the time of the 720p launch, the YouTube player was changed from a 4:3 aspect ratio to a widescreen 16:9. With this new feature, YouTube began a switchover to H.264/MPEG-4 AVC as its default video compression format. In November 2009, 1080p HD support was added. In July 2010, YouTube announced that it had launched a range of videos in 4K format, which allows a resolution of up to 4096x3072 pixels. YouTube has since lowered the maximum resolution to 3840x2160 pixels, which is twice as many pixels in both directions as 1080p.

In June 2014, YouTube introduced videos playing at 60 frames per second, in order to reproduce video games with a frame rate comparable to high-end graphics cards. The videos play back at a resolution of 720p or higher.

YouTube videos are available in a range of quality levels. The former names of standard quality (SQ), high quality (HQ) and high definition (HD) have been replaced by numerical values representing the vertical resolution of the video. The default video stream is encoded in the VP9 format with stereo Vorbis audio; if VP9/WebM is not supported in the browser/device or the browser's user agent reports Windows XP, then H.264/MPEG-4 AVC video with stereo AAC audio is used instead.

Intel Corporation is an American multinational corporation headquartered in Santa Clara, California. Intel is one of the world's largest and highest valued semiconductor chip makers, based on revenue. It is the inventor of the x86 series of microprocessors, the processors found in most personal computers.

Intel Corporation, founded on July 18, 1968, is a portmanteau of Integrated Electronics (the fact that "intel" is the term for intelligence information also made the name appropriate). Intel also makes motherboard chipsets, network interface controllers and integrated circuits, flash memory, graphic chips, embedded processors and other devices related to communications and computing. Founded by semiconductor pioneers Robert Noyce and Gordon Moore and widely associated with the executive leadership and vision of Andrew Grove, Intel combines advanced chip design capability with a leading-edge manufacturing capability. Though Intel was originally known primarily to engineers and technologists, its "Intel Inside" advertising campaign of the 1990s made it a household name, along with its Pentium processors.

Intel was an early developer of SRAM and DRAM memory chips, and this represented the majority of its business until 1981. Although Intel created the world's first commercial microprocessor chip in 1971, it was not until the success of the personal computer (PC) that this became its primary business. During the 1990s, Intel invested heavily in new microprocessor designs fostering the rapid growth of the computer industry. During this period Intel became the dominant supplier of microprocessors for PCs, and was known for aggressive and sometimes illegal tactics in defense of its market position, particularly against Advanced Micro Devices (AMD), as well as a struggle with Microsoft for control over the direction of the PC industry.

The 2013 rankings of the world's 100 most valuable brands published by Millward Brown Optimor showed the company's brand value at number 61.

Intel has also begun research into electrical transmission and generation. Intel has recently introduced a 3-D transistor that improves performance and energy efficiency. Intel has begun mass-producing this 3-D transistor, named the Tri-Gate transistor, with their 22 nm process, which is currently used in their 3rd generation core processors initially released on April 29, 201 In 2011, SpectraWatt Inc., a solar cell spinoff of Intel, filed for bankruptcy under Chapter 11. In June 2013, Intel unveiled its fourth generation of Intel Core processors (Haswell) in an event named Computex in Taipei.

The Open Source Technology Center at Intel hosts PowerTOP and LatencyTOP, and supports other open-source projects such as Wayland, Intel Array Building Blocks, Threading Building Blocks (TBB), and Xen

Corporate history
Origins
Andy Grove, Robert Noyce and Gordon Moore (1978)
The old Intel logo used from July 18, 1968 until December 2005

Intel was originally founded in Mountain View, California in 1968 by Gordon E. Moore (of "Moore's Law" fame), a chemist, and Robert Noyce, a physicist and co-inventor of the integrated circuit. Arthur Rock (investor and venture capitalist) helped them find investors, while Max Palevsky was on the board from an early stage. Moore and Noyce had left Fairchild Semiconductor to found Intel. Rock was not an employee, but he was an investor and was chairman of the board. The total initial investment in Intel was $2.5 million convertible debentures and $10,000 from Rock. Just 2 years later, Intel completed their initial public offering (IPO), raising $6.8 million ($23.50 per share).Intel's third employee was Andy Grove, a chemical engineer, who later ran the company through much of the 1980s and the high-growth 1990s.

In deciding on a name, Moore and Noyce quickly rejected "Moore Noyce", homophone for "more noise" – an ill-suited name for an electronics company, since noise in electronics is usually very undesirable and typically associated with bad interference. Instead they used the name NM Electronics before renaming their company Integrated Electronics or "Intel" for short. Since "Intel" was already trademarked by the hotel chain Intelco, they had to buy the rights for the name.
Early history

At its founding, Intel was distinguished by its ability to make semiconductors. Its first product, in 1969, was the 3101 Schottky TTL bipolar 64-bit static random-access memory (SRAM), which was nearly twice as fast as earlier Schottky diode implementations by Fairchild and the Electrotechnical Laboratory in Tsukuba, Japan. In the same year Intel also produced the 3301 Schottky bipolar 1024-bit read-only memory (ROM) and the first commercial metal–oxide–semiconductor field-effect transistor (MOSFET) silicon gate SRAM chip, the 256-bit 1101. Intel's business grew during the 1970s as it expanded and improved its manufacturing processes and produced a wider range of products, still dominated by various memory devices.
Federico Faggin, the designer of Intel 4004.

While Intel created the first commercially available microprocessor (Intel 4004) in 1971 and one of the first microcomputers in 1972, by the early 1980s its business was dominated by dynamic random-access memory chips. However, increased competition from Japanese semiconductor manufacturers had, by 1983, dramatically reduced the profitability of this market. The growing success of the IBM personal computer, based on an Intel microprocessor, was among factors that convinced Gordon Moore (CEO since 1975) to shift the company's focus to microprocessors, and to change fundamental aspects of that business model. Moore's decision to sole-source Intel's 386 chip played into the company's continuing success.

By the end of the 1980s, buoyed by its fortuitous position as microprocessor supplier to IBM and IBM's competitors within the rapidly growing personal computer market, Intel embarked on a 10-year period of unprecedented growth as the primary (and most profitable) hardware supplier to the PC industry, part of the winning 'Wintel' combination. Moore handed over to Andy Grove in 1987. By launching its Intel Inside marketing campaign in 1991, Intel was able to associate brand loyalty with consumer selection, so that by the end of the 1990s, its line of Pentium processors had become a household name.
Slowing demand and challenges to dominance

After 2000, growth in demand for high-end microprocessors slowed. Competitors, notably AMD (Intel's largest competitor in its primary x86 architecture market), garnered significant market share, initially in low-end and mid-range processors but ultimately across the product range, and Intel's dominant position in its core market was greatly reduced. In the early 2000s then-CEO Craig Barrett attempted to diversify the company's business beyond semiconductors, but few of these activities were ultimately successful.

Intel had also for a number of years been embroiled in litigation. US law did not initially recognize intellectual property rights related to microprocessor topology (circuit layouts), until the Semiconductor Chip Protection Act of 1984, a law sought by Intel and the Semiconductor Industry Association (SIA). During the late 1980s and 1990s (after this law was passed) Intel also sued companies that tried to develop competitor chips to the 80386 CPU.[32] The lawsuits were noted to significantly burden the competition with legal bills, even if Intel lost the suits Antitrust allegations had been simmering since the early 1990s and had been the cause of one lawsuit against Intel in 1991. In 2004 and 2005, AMD brought further claims against Intel related to unfair competition.

In 2005, CEO Paul Otellini reorganized the company to refocus its core processor and chipset business on platforms (enterprise, digital home, digital health, and mobility). In 2013, Intel partnered with Medopad, an enterprise mobile health solution provider to support the deployment of Medopad across the 60+ BMI Healthcare hospitals.
Regaining of momentum
In 2007, Intel unveiled its Core microarchitecture to widespread critical acclaim;the product range was perceived as an exceptional leap in processor performance that at a stroke regained much of its leadership of the field. In 2008, Intel had another "tick," when it introduced the Penryn microarchitecture, which was 45 nm. Later that year, Intel released a processor with the Nehalem architecture. Nehalem had positive reviews.
Sale of XScale processor business

On June 27, 2006, the sale of Intel's XScale assets was announced. Intel agreed to sell the XScale processor business to Marvell Technology Group for an estimated $600 million and the assumption of unspecified liabilities. The move was intended to permit Intel to focus its resources on its core x86 and server businesses, and the acquisition completed on November 9, 2006.
Acquisitions

On August 19, 2010, Intel announced that it planned to purchase McAfee, a manufacturer of computer security technology. The purchase price was $7.68 billion, and the companies said that if the deal were approved, new products would be released early in 2011. On January 26, 2011, the European Union approved the acquisition, after Intel agreed to provide rival security firms with all necessary information that would allow their products to use Intel's chips and personal computers. After the acquisition, Intel had about 90,000 employees, including about 12,000 software engineers.

On August 30, 2010, Intel and Infineon Technologies announced that Intel would acquire Infineon's Wireless Solutions business. Intel planned to use Infineon's technology in laptops, smart phones, netbooks, tablets and embedded computers in consumer products, eventually integrating its wireless modem into Intel's silicon chips.

In March 2011, Intel bought most of the assets of Cairo-based SySDSoft.

In July 2011, Intel announced that it had agreed to acquire Fulcrum Microsystems Inc., a company specializing in network switches. The company was previously included on the EE Times list of 60 Emerging Startups.

On October 1, 2011, Intel reached a deal to acquire Telmap, an Israeli-based navigation software company. The purchase price was not disclosed, but Israeli media reported values around $300 million to $350 million.

In July 2012, Intel Corporation agreed to buy 10 percent shares of ASML Holding NV for $2.1 billion and another $1 billon for 5 percent shares that need shareholder approval to fund relevant research and development efforts, as part of a EUR3.3 billion ($4.1 billion) deal to accelerate the development of 450-millimeter wafer technology and extreme ultra-violet lithography by as much as two years.

In July 2013, Intel confirmed the acquisition of Omek Interactive, an Israeli company that makes technology for gesture-based interfaces, without disclosing the monetary value of the deal. An official statement from Intel read: "The acquisition of Omek Interactive will help increase Intel's capabilities in the delivery of more immersive perceptual computing experiences." One report estimated the value of the acquisition between US$30 million and $50 million.

The acquisition of a Spanish natural language recognition startup named Indisys was announced on September 13, 2013. The terms of the deal were not disclosed but an email from an Intel representative stated: "Intel has acquired Indisys, a privately held company based in Seville, Spain. The majority of Indisys employees joined Intel. We signed the agreement to acquire the company on May 31 and the deal has been completed." Indysis explains that its artificial intelligence (AI) technology "is a human image, which converses fluently and with common sense in multiple languages and also works in different platforms."

In December 2014, Intel bought PasswordBox.


Expansions

In 2008, Intel spun off key assets of a solar startup business effort to form an independent company, SpectraWatt Inc. However, as of 2011, SpectraWatt has filed for bankruptcy.

In February 2011, Intel announced plans to build a new microprocessor manufacturing facility in Chandler, Arizona, which is expected to be completed in 2013, at a cost of $5 billion. It will accommodate 4,000 employees. The company produces three-quarters of their products in the United States, although three-quarters of their revenue comes from overseas.

In April 2011, Intel began a pilot project with ZTE Corporation to produce smartphones using the Intel Atom processor for China's domestic market. This project is intended to challenge the domination of ARM processors in mobile phones.

In December 2011, Intel announced that it reorganized several of its business units to form a new mobile and communications group.This group will be responsible for the company's smartphone, tablet and wireless efforts, and will be headed by Hermann Eul and Mike Bell.
Opening up the foundries

Finding itself with excess fab capacity after the failure of the Ultrabook to gain market traction and with PC sales declining, in 2013 Intel reached a foundry agreement to produce chips for Altera using 14-nm process. General Manager of Intel's custom foundry division Sunit Rikhi indicated that Intel would pursue further such deals in the future. This was after poor sales of Windows 8 hardware caused a major retrenchment for most of the major semconductor manufacturers, except for Qualcomm, which continued to see healthy purchases from its largest customer, Apple.


As of July 2013, five companies will use Intel's fabs via the Intel Custom Foundry division: Achronix, Tabula, Netronome, Microsemi, and Altera—most are FPGA makers, but Netronome designs network processors. Only Achronix began shipping chips made by Intel using the 22-nm Tri-Gate process. Several other customers also exist but were not announced at the time.

The Alliance for Affordable Internet (A4AI) was launched in October 2013 and Intel is part of the coalition of public and private organisations that also includes Facebook, Google, and Microsoft. Led by Sir Tim Berners-Lee, the A4AI seeks to make Internet access more affordable so that access is broadened in the developing world, where only 31% of people are online. Google will help to decrease internet access prices so that they fall below the UN Broadband Commission's worldwide target of 5% of monthly income.
Product and market history
SRAMS and the microprocessor

Intel's first products were shift register memory and random-access memory integrated circuits, and Intel grew to be a leader in the fiercely competitive DRAM, SRAM, and ROM markets throughout the 1970s. Concurrently, Intel engineers Marcian Hoff, Federico Faggin, Stanley Mazor and Masatoshi Shima invented Intel's first microprocessor. Originally developed for the Japanese company Busicom to replace a number of ASICs in a calculator already produced by Busicom, the Intel 4004 was introduced to the mass market on November 15, 1971, though the microprocessor did not become the core of Intel's business until the mid-1980s. (Note: Intel is usually given credit with Texas Instruments for the almost-simultaneous invention of the microprocessor)
From DRAM to microprocessors

In 1983, at the dawn of the personal computer era, Intel's profits came under increased pressure from Japanese memory-chip manufacturers, and then-president Andy Grove focused the company on microprocessors. Grove described this transition in the book Only the Paranoid Survive. A key element of his plan was the notion, then considered radical, of becoming the single source for successors to the popular 8086 microprocessor.

Until then, the manufacture of complex integrated circuits was not reliable enough for customers to depend on a single supplier,[clarification needed] but Grove began producing processors in three geographically distinct factories,[which?] and ceased licensing the chip designs to competitors such as Zilog and AMD.[citation needed] When the PC industry boomed in the late 1980s and 1990s, Intel was one of the primary beneficiaries.
Intel, x86 processors, and the IBM PC
The die from an Intel 8742, an 8-bit microcontroller that includes a CPU running at 12 MHz, 128 bytes of RAM, 2048 bytes of EPROM, and I/O in the same chip.

Despite the ultimate importance of the microprocessor, the 4004 and its successors the 8008 and the 8080 were never major revenue contributors at Intel. As the next processor, the 8086 (and its variant the 8088) was completed in 1978, Intel embarked on a major marketing and sales campaign for that chip nicknamed "Operation Crush", and intended to win as many customers for the processor as possible. One design win was the newly created IBM PC division, though the importance of this was not fully realized at the time.

IBM introduced its personal computer in 1981, and it was rapidly successful. In 1982, Intel created the 80286 microprocessor, which, two years later, was used in the IBM PC/AT. Compaq, the first IBM PC "clone" manufacturer, produced a desktop system based on the faster 80286 processor in 1985 and in 1986 quickly followed with the first 80386-based system, beating IBM and establishing a competitive market for PC-compatible systems and setting up Intel as a key component supplier.

In 1975, the company had started a project to develop a highly advanced 32-bit microprocessor, finally released in 1981 as the Intel iAPX 432. The project was too ambitious and the processor was never able to meet its performance objectives, and it failed in the marketplace. Intel extended the x86 architecture to 32 bits instead.
386 microprocessor

During this period Andrew Grove dramatically redirected the company, closing much of its DRAM business and directing resources to the microprocessor business. Of perhaps greater importance was his decision to "single-source" the 386 microprocessor. Prior to this, microprocessor manufacturing was in its infancy, and manufacturing problems frequently reduced or stopped production, interrupting supplies to customers. To mitigate this risk, these customers typically insisted that multiple manufacturers produce chips they could use to ensure a consistent supply. The 8080 and 8086-series microprocessors were produced by several companies, notably AMD. Grove made the decision not to license the 386 design to other manufacturers, instead producing it in three geographically distinct factories: Santa Clara, California; Hillsboro, Oregon; and Chandler, a suburb of Phoenix, Arizona. He convinced customers that this would ensure consistent delivery. As the success of Compaq's Deskpro 386 established the 386 as the dominant CPU choice, Intel achieved a position of near-exclusive dominance as its supplier. Profits from this funded rapid development of both higher-performance chip designs and higher-performance manufacturing capabilities, propelling Intel to a position of unquestioned leadership by the early 1990s.
486, Pentium, and Itanium

Intel introduced the 486 microprocessor in 1989, and in 1990 formally established a second design team, designing the processors code-named "P5" and "P6" in parallel and committing to a major new processor every two years, versus the four or more years such designs had previously taken. Engineers Vinod Dham and Rajeev Chandrasekhar (Member of Parliament, India) were key figures on the core team that invented the 486 chip and later, Intel's signature Pentium chip. The P5 was earlier known as "Operation Bicycle," referring to the cycles of the processor. The P5 was introduced in 1993 as the Intel Pentium, substituting a registered trademark name for the former part number (numbers, such as 486, are hard to register as a trademark). The P6 followed in 1995 as the Pentium Pro and improved into the Pentium II in 1997. New architectures were developed alternately in Santa Clara, California and Hillsboro, Oregon.

The Santa Clara design team embarked in 1993 on a successor to the x86 architecture, codenamed "P7". The first attempt was dropped a year later, but quickly revived in a cooperative program with Hewlett-Packard engineers, though Intel soon took over primary design responsibility. The resulting implementation of the IA-64 64-bit architecture was the Itanium, finally introduced in June 2001. The Itanium's performance running legacy x86 code did not meet expectations, and it failed to compete effectively with x86-64, which was AMD's 64-bit extensions to the original x86 architecture (Intel uses the name Intel 64, previously EM64T). As of 2012, Intel continues to develop and deploy the Itanium; known planning continues into 2014.

The Hillsboro team designed the Willamette processors (initially code-named P68), which were marketed as the Pentium 4.[citation needed]
Pentium flaw
Main article: Pentium FDIV bug

In June 1994, Intel engineers discovered a flaw in the floating-point math subsection of the P5 Pentium microprocessor. Under certain data-dependent conditions, the low-order bits of the result of a floating-point division would be incorrect. The error could compound in subsequent calculations. Intel corrected the error in a future chip revision, but nonetheless declined to disclose it.[citation needed]

In October 1994, Dr. Thomas Nicely, Professor of Mathematics at Lynchburg College, independently discovered the bug. He contacted Intel, but received no response. On October 30, he posted a message on the Internet.Word of the bug spread quickly and reached the industry press. The bug was easy to replicate; a user could enter specific numbers into the calculator on the operating system. Consequently, many users did not accept Intel's statements that the error was minor and "not even an erratum." During Thanksgiving, in 1994, The New York Times ran a piece by journalist John Markoff spotlighting the error. Intel changed its position and offered to replace every chip, quickly putting in place a large end-user support organization. This resulted in a $500 million charge against Intel's 1994 revenue.

Ironically, the "Pentium flaw" incident, Intel's response to it, and the surrounding media coverage propelled Intel from being a technology supplier generally unknown to most computer users to a household name. Dovetailing with an uptick in the "Intel Inside" campaign, the episode is considered to have been a positive event for Intel, changing some of its business practices to be more end-user focused and generating substantial public awareness, while avoiding a lasting negative impression.
"Intel Inside" and other 1990s programs

During this period, Intel undertook two major supporting programs. The first is widely known: the 1991 "Intel Inside" marketing and branding campaign. The idea of ingredient branding was new at the time with only Nutrasweet and a few others making attempts to do so. This campaign established Intel, which had been a component supplier little-known outside the PC industry, as a household name.

The second program is little-known: Intel's Systems Group began, in the early 1990s, manufacturing PC "motherboards", the main board component of a personal computer, and the one into which the processor (CPU) and memory (RAM) chips are plugged. Shortly after, Intel began manufacturing fully configured "white box" systems for the dozens of PC clone companies that rapidly sprang up.[citation needed] At its peak in the mid-1990s, Intel manufactured over 15% of all PCs, making it the third-largest supplier at the time.[citation needed]

During the 1990s, Intel's Architecture Lab (IAL) was responsible for many of the hardware innovations of the personal computer, including the PCI Bus, the PCI Express (PCIe) bus, the Universal Serial Bus (USB). IAL's software efforts met with a more mixed fate; its video and graphics software was important in the development of software digital video,citation needed] but later its efforts were largely overshadowed by competition from Microsoft. The competition between Intel and Microsoft was revealed in testimony by IAL Vice-President Steven McGeady at the Microsoft antitrust trial.

WordPress users may install and switch between themes. Themes allow users to change the look and functionality of a WordPress website or installation without altering the information content or structure of the site. Themes may be installed using the WordPress "Appearance" administration tool or theme folders may be uploaded via FTP. The PHP, HTML (HyperText Markup Language) and CSS (Cascading Style Sheets) code found in themes can be added to or edited for providing advanced features. Thousands of WordPress themes exist, some free, and some paid for templates. WordPress users may also create and develop their own custom themes if they have the knowledge and skill to do so.
Plugins

WordPress's plugin architecture allows users to extend its features. WordPress has over 30,000 plugins available, each of which offers custom functions and features enabling users to tailor their sites to their specific needs. These customizations range from search engine optimization, to client portals used to display private information to logged in users, to content displaying features, such as the addition of widgets and navigation bars.
Mobiles

Native applications exist for WebOS,Android, iOS (iPhone, iPod Touch, iPad) Windows Phone, and BlackBerry. These applications, designed by Automattic, allow a limited set of options, which include adding new blog posts and pages, commenting, moderating comments, replying to comments in addition to the ability to view the stats.
Other features

WordPress also features integrated link management; a search engine–friendly, clean permalink structure; the ability to assign multiple categories to articles; and support for tagging of posts and articles. Automatic filters are also included, providing standardized formatting and styling of text in articles (for example, converting regular quotes to smart quotes). WordPress also supports the Trackback and Pingback standards for displaying links to other sites that have themselves linked to a post or an article.
Multi-user and multi-blogging

Prior to version 3, WordPress supported one blog per installation, although multiple concurrent copies may be run from different directories if configured to use separate database tables. WordPress Multisites (previously referred to as WordPress Multi-User, WordPress MU, or WPMU) was a fork of WordPress created to allow multiple blogs to exist within one installation but is able to be administered by a centralized maintainer. WordPress MU makes it possible for those with websites to host their own blogging communities, as well as control and moderate all the blogs from a single dashboard. WordPress MS adds eight new data tables for each blog...

As of the release of WordPress 3, WordPress MU has merged with WordPress.
History

b2/cafelog, more commonly known as simply b2 or cafelog, was the precursor to WordPress. b2/cafelog was estimated to have been installed on approximately 2,000 blogs as of May 2003. It was written in PHP for use with MySQL by Michel Valdrighi, who is now a contributing developer to WordPress. Although WordPress is the official successor, another project, b2evolution, is also in active development.

WordPress first appeared in 2003 as a joint effort between Matt Mullenweg and Mike Little to create a fork of b2Christine Selleck Tremoulet, a friend of Mullenweg, suggested the name WordPress

In 2004 the licensing terms for the competing Movable Type package were changed by Six Apart and many of its most influential users migrated to WordPress.By October 2009 the 2009 Open Source content management system Market Share Report reached the conclusion that WordPress enjoyed the greatest brand strength of any open-source content-management systems.
Release history

Main releases of WordPress are codenamed after well-known jazz musicians, starting after version 1.0.
Legend:     Old version     Older version, still supported     Current version     Future release
Version     Code name     Release date     Notes
0.7     none     27 May 2003      Used the same file structure as its predecessor, b2/cafelog, and continued the numbering from its last release, 0.6.[30] Only 0.71-gold is available for download in the official WordPress Release Archive page.
1.0     Davis     3 January 2004      Added search engine friendly permalinks, multiple categories, dead simple installation and upgrade, comment moderation, XFN support, Atom support.
1.2     Mingus     22 May 2004     Added support of Plugins; which same identification headers are used unchanged in WordPress releases as of 2011.
1.5     Strayhorn     17 February 2005      Added a range of vital features, such as ability to manage static pages and a template/Theme system. It was also equipped with a new default template (code named Kubrick). designed by Michael Heilemann.
2.0     Duke     31 December 2005      Added rich editing, better administration tools, image uploading, faster posting, improved import system, fully overhauled the back end, and various improvements to Plugin developers.
2.1     Ella     22 January 2007      Corrected security issues, redesigned interface, enhanced editing tools (including integrated spell check and auto save), and improved content management options.
2.2     Getz     16 May 2007      Added widget support for templates, updated Atom feed support, and speed optimizations.
2.3     Dexter     24 September 2007      Added native tagging support, new taxonomy system for categories, and easy notification of updates, fully supports Atom 1.0, with the publishing protocol, and some much needed security fixes.
2.5     Brecker     29 March 2008      Version 2.4 was skipped, so version 2.5 added two releases worth of new code. The administration interface was fully redesigned, and the WordPress website to match the new style.
2.6     Tyner     15 July 2008      Added new features that made WordPress a more powerful CMS: it can now track changes to every post and page and allow easy posting from anywhere on the web.
2.7     Coltrane     11 December 2008      Administration interface redesigned fully, added automatic upgrades and installing Plugins, from within the administration interface.
2.8     Baker     10 June 2009      Added improvements in speed, automatic installing of Themes from within administration interface, introduces the CodePress editor for syntax highlighting and a redesigned widget interface.
2.9     Carmen     19 December 2009      Added global undo, built-in image editor, batch Plugin updating, and many less visible tweaks.
3.0     Thelonious     17 June 2010     Added a new Theme application programming interfaces (API); the merge of WordPress and WordPress MU, creating the new multi-site functionality, a new default Theme called "Twenty Ten" and a refreshed, lighter admin UI.
3.1     Reinhardt     23 February 2011     Added the Admin Bar, which is displayed on all blog pages when an admin is logged in, and Post Format, best explained as a Tumblr like micro-blogging feature. It provides easy access to many critical functions, such as comments and updates. Includes internal linking abilities, a newly streamlined writing interface, and many other changes.
3.2     Gershwin     4 July 2011      Focused on making WordPress faster and lighter. Released only four months after version 3.1, reflecting the growing speed of development in the WordPress community.
3.3     Sonny     12 December 2011      Focused on making WordPress friendlier for beginners and tablet computer users.
3.4     Green     13 June 2012     Focused on improvements to Theme customization, Twitter integration and several minor changes.
3.5     Elvin     11 December 2012      Support for the Retina Display, color picker, new Theme: Twenty Twelve, improved image workflow
3.6     Oscar     1 August 2013      New Theme: Twenty Thirteen ; Admin Enhancements - Post Formats UI Update, Menus UI improvements, Revisions Update, Autosave and Post Locking
3.7     Basie     24 October 2013      Automatically apply maintenance and security updates in the background; Stronger password recommendations; Support for automatically installing the right language files and keeping them up to date
3.8     Parker     12 December 2013      Improved admin interface; Responsive design for mobile devices; New typography using Open Sans; Admin color schemes; Redesigned Theme management interface; Simplified main dashboard; Twenty Fourteen magazine style default Theme; Second release using "Plugin-first development process"
3.9     Smith     16 April 2014      "New features like live widget previews and the new Theme installer are now more ready for prime time, so check 'em out.

UI refinements when editing images and when working with media in the editor. We've also brought back some of the advanced display settings for images."
4.0     Benny     4 September 2014     Improved media management, embeds, writing interface, and plugin discovery.
4.1     Dinah     18 December 2014      "We’ve made a lot of refinements over the last few weeks. RC means we think we’re done, but with millions of users anthousands of plugins and themes, it’s possible we’ve missed something. We hope to ship WordPress 4.1 on Tuesday, December 16, but we need your help to get there. If you haven’t tested 4.1 yet, now is the time! (Please though, not on your live site unless you’re adventurous."
Future

Matt Mullenweg has stated that the future of WordPress is in social, mobile, and as an application platform.
Vulnerabilitie
Many security issues have been uncovered in the software, particularly in 2007 and 2008. According to Secunia, WordPress in April 2009 had 7 unpatched security advisories (out of 32 total), with a maximum rating of "Less Critical." Secunia maintains an up-to-date list of WordPress vulnerabilities.

In January 2007, many high profile search engine optimization (SEO) blogs, as well as many low-profile commercial blogs featuring AdSense, were targeted and attacked with a WordPress exploit. A separate vulnerability on one of the project site's web servers allowed an attacker to introduce exploitable code in the form of a back door to some downloads of WordPress 2.1.1. The 2.1.2 release addressed this issue; an advisory released at the time advised all users to upgrade immediately.

In May 2007, a study revealed that 98% of WordPress blogs being run were exploitable because they were running outdated and unsupported versions of the software.[65] In part to mitigate this problem, WordPress made updating the software a much easier, "one click" automated process in version 2.7 (released in December 2008).[66] However, the filesystem security settings required to enable the update process can be an additional risk.[67]

In a June 2007 interview, Stefan Esser, the founder of the PHP Security Response Team, spoke critically of WordPress's security track record, citing problems with the application's architecture that made it unnecessarily difficult to write code that is secure from SQL injection vulnerabilities, as well as some other problems.[68]

In June 2013, it was found that some of the 50 most downloaded WordPress plugins were vulnerable to common Web attacks such as SQL injection and XSS. A separate inspection of the top-10 e-commerce plugins showed that 7 of them were vulnerable.[69]

In an effort to promote better security, and to streamline the update experience overall, automatic background updates were introduced in WordPress 3.7.

Individual installations of WordPress can be protected with security plugins. Users can also protect their WordPress installations by taking steps such as keeping all WordPress installation, themes, and plugins updated, using only trusted themes and plugins,editing the site's .htaccess file to prevent many types of SQL injection attacks and block unauthorized access to sensitive files.

Developers can also use tools to analyze potential vulnerabilities, including Wordpress Auditor or Wordpress Sploit Framework developed by 0pc0deFR. These types of tools research known vulnerabilities, such as a XSS or SQL injection. Some vulnerabilities can not be detected by the tools, so it is advisable to check the code from other developers.
Critiques

Independent analyst firm Real Story Group evaluates WordPress as a Web content management system CMS. In a 2014 analysis, the firm argued that growing enterprise demand for WordPress was part of a broader push for "embracing greater simplicity" in web publishing.
Development and support
Key developers

Matt Mullenweg and Mike Little were cofounders of the project. The core contributing developers include Ryan Boren, Mark Jaquith, Matt Mullenweg, Andrew Ozz, Peter Westwood and Andrew Nacin.

WordPress is also developed by its community, including WP testers, a group of volunteers who test each release. They have early access to nightly builds, beta versions and release candidates. Errors are documented in a special mailing list, or the project's Trac tool.

Though largely developed by the community surrounding it, WordPress is closely associated with Automattic, the company founded by Matt Mullenweg. On September 9, 2010, Automattic handed the WordPress trademark to the newly created WordPress Foundation, which is an umbrella organization supporting WordPress.org (including the software and archives for plugins and themes), bbPress and BuddyPress.
WordCamp developer and user conferences
A WordCamp in Sofia, Bulgaria (2011)

"WordCamp" is the name given to all WordPress-related gatherings, both informal unconferences and more formal conferences.[78] The first such event was WordCamp 2006 in August 2006 in San Francisco, which lasted one day and had over 500 attendees.[79][80] The first WordCamp outside San Francisco was held in Beijing in September 2007.[81] Since then, there have been over 350 WordCamps in over 150 cities in 48 different countries around the world.WordCamp San Francisco, an annual event, remains the official annual conference of WordPress developers and users.
Support

WordPress's primary support website is WordPress.org. This support website hosts both WordPress Codex, the online manual for WordPress and a living repository for WordPress information and documentation, and WordPress Forums, an active online community of WordPress users.

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