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GitHub is a web-based hosted service for version control using GIT. It is mainly used for computer code. It provides all of GIT's distributed version control and source control (SCM) capabilities and adds its own.

It provides access control and multiple collaboration capabilities for each project, such as error tracking, feature requests, task management, and wikis.

GitHub provides programs for businesses, teams, professional accounts, and free accounts that are often used to host open source software projects. As of January 2019, GitHub provides unlimited private repositories for all programs, including free accounts.

As of June 2018, GitHub reported over 28 million users and 57 million repositories (including 28 million public repositories), making it the world's largest source code host.

GitHub by Chris wanstrath, P. J. Hyett, Tom Preston Werner and Scott Chacon developed using Ruby on rails, starting in February 2008. GitHub, Inc. was founded in 2007 in San Francisco.

On February 24, 2009, members of GitHub team announced in a speech by Yahoo. Headquarters, in its first year online, GitHub has accumulated more than 46000 public repositories, 17000 in the last month alone. At that time, at least 6200 repositories were forked once, and 4600 were merged.

On July 5, 2009, GitHub announced that the site has been used by more than 100000 users. On July 27, 2009, in another speech on Yahoo!, Preston Werner announced that GitHub has developed to host 90000 unique public repositories, 12000 of which have been forked at least once, with a total of 135000 repositories.

On July 25, 2010, GitHub announced that it would host 1 million repositories. On April 20, 2011, GitHub announced that it would host two million repositories.

On June 2, 2011, ReadWriteWeb reported that between January 2011 and may 2011, the total number of GitHub submissions exceeded SourceForge and Google Code.

On July 9, 2012, Peter Levine, general partner of Andreessen Horowitz, an investor in GitHub, said that since 2008, GitHub's revenue has grown at an annual rate of 300%, "almost full profit".

On January 16, 2013, GitHub announced that it had broken the 3 million user mark and hosted more than 5 million repositories. On December 23, 2013, GitHub announced that it had reached 10 million repositories.

GitHub opened an office in Japan in June 2015, its first outside of the United States.

On July 29, 2015, GitHub announced that it had raised $250 million in a round of financing led by Sequoia Capital. The financing round valued the company at about $2 billion.

In 2016, GitHub ranked 14th on the Forbes cloud 100 list.

On February 28, 2018, GitHub became the second largest victim of distributed denial of service (DDoS) attacks in history, with incoming traffic reaching a peak of about 1.35 TB per second.

On June 4, 2018, Microsoft announced an agreement to acquire GitHub for $7.5 billion. The purchase ended on October 26, 2018.

On June 19, 2018, GitHub expanded GitHub education by providing free education bundles to all schools.

The development of GitHub platform started on October 19, 2007. The website was launched in April 2008 by Tom Preston Werner, Chris wanstrath, P. J. Hyett and Scott Chacon launched after months of beta releases.

You can use the standard git command-line interface to access and manipulate projects on GitHub, which can be used by all standard git commands. GitHub also allows registered and unregistered users to browse public repositories on the site. GitHub and other third parties integrated with the platform have also created multiple desktop clients and git plug-ins.

The site provides features similar to social networks, such as feeds, followers, wikis (using wiki software called Gollum) and social network diagrams to show how developers work with their version libraries ("Forks") and what forks (and their branches) are up to date.

Users must create an account to contribute content to the site, but anyone can browse and download the public repository. With a registered user account, users can discuss, manage repositories, submit to other repositories, and view changes to code.

The basic software to support GitHub is git itself, written by Linux creator Linus Torvalds. Other software that provides the GitHub user interface was written by wanstrath, hyett, and Preston Werner, developers of GitHub, Inc., using Ruby on rails and Erlang.