PC-DOS 2.x

IBM PC-DOS was an IBM branded version of MS-DOS licensed from Microsoft for use on the IBM PC system. Versions of PC-DOS paralleled that of MS-DOS up until version 6.1, where PC-DOS was independently maintained by IBM up until 7.1, the last version. Although not the only OS available for the IBM PC when it came out, it quickly became popular due to its low cost in comparison to the others. Its direct competitors on the PC at the time were CP/M-86 and UCSD p-System. The major differences between PC-DOS and MS-DOS were only in terms of driver support and built in programs until version 6.1 where development diverged.

For Microsoft and other OEM DOS releases, please see the MS-DOS product page.

The first version of PC-DOS was released in August 1981 with the IBM PC. The last version released by IBM was PC-DOS 7.1, which had updates all the way up until 2003. This last version of DOS is still in use by some hardware developers usually embedded into recovery tools and BIOS flashers.

This OS does not have a GUI. It uses a command line interface, however PC-DOS 4 and later, like MS-DOS, also included the optional graphical DOSShell program. Like other DOSes, third party GUIs can be installed.

Release notes

PC-DOS 2.0 was IBM's PC-specific adaption of MS-DOS 2.0. Version 2.0 introduced various features inspired by Xenix, a variant of Unix sold by Microsoft. These features included subdirectories, file redirection, and file handles. DOS 2.0 also introduced loadable device drivers, hard drive support, and 9-sector 180k/360k floppy disk support.

Installation instructions

IBM PC-DOS was only intended to operate on the IBM Personal Computer. However, the rise of hardware compatible clones enabled PC-DOS to fully run on machines from vendors such as Columbia Data Products and Compaq.

Product type
Release date
Minimum CPU
Minimum RAM
User interface
Download count
127 (17 for release)


Download name Version Language Architecture File size Downloads
IBM JX PC DOS 2.1 (1983) (3.5-360k) 2.1 for JX PC English 20.58MB 1
IBM PC-DOS 2.00 (5.25) 2.00 English 3.38MB 8
IBM PC-DOS 2.00 Manual Jan83 2.00 English 19.43MB 3
IBM PC-DOS 2.10 (5.25) 2.10 English 3.42MB 5
IBM PC-DOS 2.10 Manuals Sep83 2.10 English 14.72MB 0


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