Web site: www.digitalresearch.biz/CPM.HTM
Desktop environment: CLI
Architecture: Intel 8080/8085/8086, Motorola 68000, Zilog 80/8000
Based on: independent
The last version | Released: 3.1 | 1983
CP/M (Control Program for Microcomputers) is an operating system created by Digital Research Corporation. CP/M was one of the first 8-bit operating systems for personal computers.
In 1974, Dr. Gary A. Kildall, while working for Intel Corporation, created CP/M as the first operating system for the new microprocessor. By 1977, CP/M had become the most popular operating system (OS) in the fledgling microcomputer (PC) industry. The largest Digital Research licensee of CP/M was a small company which had started life as Traf-0-Data, and is now known as Microsoft. In 1981, Microsoft paid Seattle Software Works for an unauthorized clone of CP/M, and Microsoft licensed this clone to IBM which marketed it as PC-DOS on the first IBM PC in 1981, and Microsoft marketed it to all other PC OEMs as MS-DOS.
Digital Research Corporation made a critical strategic error by not agreeing to produce an operating system for the first IBM PC. According to the folklore, the president of Digital Research was flying his airplane when IBM came to call. IBM marched out and never looked back.
Instead, IBM turned to Microsoft Corporation, which developed MS-DOS based on version 2.2 of CP/M. By the mid 1980s, MS-DOS had become the standard operating system for IBM-compatible personal computers. CP/M is now obsolete.
Digital Research, Inc. (DR or DRI) was a company created by Gary Kildall to market and develop his CP/M operating system and related 8-bit, 16-bit and 32-bit systems.