<p><strong>GitHub</strong> is a web-based <a title="Git" href="https://en.wikipedia.org/wiki/Git">Git</a> or <a title="Repository (version control)" href="https://en.wikipedia.org/wiki/Repository_(version_control)">version control repository</a> and <a title="Internet hosting service" href="https://en.wikipedia.org/wiki/Internet_hosting_service">Internet hosting service</a>. It is mostly used for code. It offers all of the <a title="Distributed version control" href="https://en.wikipedia.org/wiki/Distributed_version_control">distributed version control</a> and <a class="mw-redirect" title="Source code management" href="https://en.wikipedia.org/wiki/Source_code_management">source code management</a> (SCM) functionality of Git as well as adding its own features. It provides <a title="Access control" href="https://en.wikipedia.org/wiki/Access_control">access control</a> and several collaboration features such as <a title="Bug tracking system" href="https://en.wikipedia.org/wiki/Bug_tracking_system">bug tracking</a>, <a title="Software feature" href="https://en.wikipedia.org/wiki/Software_feature">feature requests</a>, <a title="Task management" href="https://en.wikipedia.org/wiki/Task_management">task management</a>, and<a title="Wiki" href="https://en.wikipedia.org/wiki/Wiki">wikis</a> for every project.<sup id="cite_ref-hugeinvestment_3-0" class="reference"><a href="https://en.wikipedia.org/wiki/GitHub#cite_note-hugeinvestment-3">[3]</a></sup></p>
<p>GitHub offers both plans for private and free <a title="Repository (version control)" href="https://en.wikipedia.org/wiki/Repository_(version_control)">repositories</a> on the same account<sup id="cite_ref-4" class="reference"><a href="https://en.wikipedia.org/wiki/GitHub#cite_note-4">[4]</a></sup> which are commonly used to host <a class="mw-redirect" title="Open-source" href="https://en.wikipedia.org/wiki/Open-source">open-source</a> software projects.<sup id="cite_ref-5" class="reference"><a href="https://en.wikipedia.org/wiki/GitHub#cite_note-5">[5]</a></sup> As of April 2017, GitHub reports having almost 20 million users and 57 million repositories,<sup id="cite_ref-6" class="reference"><a href="https://en.wikipedia.org/wiki/GitHub#cite_note-6">[6]</a></sup>making it the largest host of <a title="Source code" href="https://en.wikipedia.org/wiki/Source_code">source code</a> in the world.<sup id="cite_ref-7" class="reference"><a href="https://en.wikipedia.org/wiki/GitHub#cite_note-7">[7]</a></sup></p>
<p>GitHub has a <a title="Mascot" href="https://en.wikipedia.org/wiki/Mascot">mascot</a> called Octocat, a cat with five tentacles and a human-like face.<sup id="cite_ref-Octodex_FAQ_8-0" class="reference"><a href="https://en.wikipedia.org/wiki/GitHub#cite_note-Octodex_FAQ-8">[8]</a></sup><sup id="cite_ref-Jaramillo_9-0" class="reference"><a href="https://en.wikipedia.org/wiki/GitHub#cite_note-Jaramillo-9">[9]</a></sup></p>