IBM PC DOS

IBM PC DOS

Version 1.10 (1982) command line
Developer	Microsoft IBM
Written in	Assembly language, C
OS family	DOS
Working state	No longer supported
Source model	Closed source
Initial release	August 1981; 42 years ago (1981-08)
Latest release	PC DOS 2000 / April 1998; 26 years ago (1998-04)
Latest preview	PC DOS 7.1 / 2003; 21 years ago (2003)
Available in	English (US), English (UK), Danish, Dutch, Finnish, French, German, Italian, Norwegian, Portuguese, Russian, Spanish, Swedish
Platforms	x86
Kernel type	Monolithic kernel
Default user interface	Command-line interface (COMMAND.COM)
License	Commercial proprietary software

IBM PC DOS (an acronym for IBM Personal Computer Disk Operating System),^{[nb 1]} also known as PC DOS or IBM DOS, is a discontinued disk operating system for the IBM Personal Computer, its successors, and IBM PC compatibles. It was manufactured and sold by IBM from the early 1980s into the 2000s. Developed by Microsoft, it was also sold by that company as MS-DOS. Both operating systems were identical or almost identical until 1993, when IBM began selling PC DOS 6.1 with new features. The collective shorthand for PC DOS and MS-DOS was DOS, which is also the generic term for disk operating system, and is shared with dozens of disk operating systems called DOS.
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