CP/M<p><strong>CP/M</strong> (<strong>Control Program for Microcomputers</strong> was a mass-market <a href="https://en.wikipedia.org/wiki/Operating_system" rel="noopener" target="_blank">operating system</a> created for <a href="https://en.wikipedia.org/wiki/Intel_8080" rel="noopener" target="_blank">Intel 8080</a>/<a href="https://en.wikipedia.org/wiki/Intel_8085" rel="noopener" target="_blank">85</a> based <a href="https://en.wikipedia.org/wiki/Microcomputer" rel="noopener" target="_blank">microcomputers</a> by <a href="https://en.wikipedia.org/wiki/Digital_Research" rel="noopener" target="_blank">Digital Research, Inc</a>. Initially confined to single-tasking on <a href="https://en.wikipedia.org/wiki/8-bit_processor" rel="noopener" target="_blank">8-bit processors</a> and no more than 64 <a href="https://en.wikipedia.org/wiki/Kilobyte" rel="noopener" target="_blank">kilobytes</a> of memory, later versions of CP/M added multi-user variations and were migrated to <a href="https://en.wikipedia.org/wiki/16-bit_processor" rel="noopener" target="_blank">16-bit processors</a>.</p>