MS-DOS 3.31

Originally 86-DOS, written by Tim Paterson of Seattle Computer Products, DOS was a rough clone of CP/M for 8086 based hardware. Microsoft purchased it and licensed it to IBM for use with Microsoft's IBM PC language products. In 1982, Microsoft began licensing DOS to other OEMs that ported it to their custom x86 hardware and IBM PC clones.

For IBM-specific releases, please see the IBM PC-DOS product page.



Release notes

MS-DOS 3.31 was only sold through a few OEMs, mainly Compaq.

This version adds support for hard drives up to 512MB.

It also does not use as much conventional memory as DOS 4.x or later, making it a good choice for 8088/8086 based computers.

Product type
OS
Vendor
Microsoft
Release date
1988
Minimum CPU
8088
User interface
Text
Platform
DOS
Download count
1092 (18 for release)

Downloads

Download name Version Language Architecture File size Downloads
Microsoft MS-DOS 3.31 (3.5-1.44mb) 3.31 English 302.39KB 12
Microsoft MS-DOS 3.31 [Compaq OEM Rev G] (3.5-720k) 3.31 [Compaq OEM Rev G] English 438.86KB 2
Microsoft MS-DOS 3.31 [Compaq OEM] (3.5-720k) 3.31 [Compaq OEM] English 749.01KB 1
Microsoft MS-DOS 3.31 [Emerson OEM] (5.25-1.2mb) 3.31 [Emerson OEM] English 739.87KB 2
Microsoft MS-DOS 3.31 [German] [Compaq OEM] (5.25-360k) 3.31 [Compaq OEM] German 466.51KB 1

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