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dir (command)
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<p>dir, short for <i>directory</i>, is a <a href="/facts/Shell_(computing)/Sa67elS7">shell</a> <a href="/facts/Command_(computing)/zUrvQbFy">command</a> for listing <a href="/facts/File_system/FdPm90uc">file system</a> contents; <a href="/facts/Computer_file/FjFH3Ufm">files</a> and <a href="/facts/File_directory/VLtLcEXY">directories</a>. Arguably, the command provides the same essential functionality as the <a href="/facts/Ls/5GsH3v2a">ls</a> command, but typically the two commands are described as notably separate concepts, possibly since ls is implemented from a <a href="/facts/Codebase/MT0CJ4oD">codebase</a> that shars more history than many dir implementations. </p><p>The command is often implemented as internal in the <a href="/facts/Operating_system/8XTuvMh2">operating system</a> <a href="/facts/Shell_(computing)/Sa67elS7">shell</a> instead of as a separate application as many other commands are. </p>