DOS<p><strong>DOS</strong> short for <strong>Disk Operating System</strong>, is an acronym for several closely related <a href="https://en.wikipedia.org/wiki/Operating_system" rel="noopener" target="_blank">operating systems</a> that dominated the <a href="https://en.wikipedia.org/wiki/IBM_PC_compatible" rel="noopener" target="_blank">IBM PC compatible</a> market between 1981 and 1995, or until about 2000 including the partially DOS-based Microsoft Windows versions 95, 98, and Millennium Edition.</p>