MS-DOS 6.21

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.

This version was specifically released to remove DoubleSpace due to legal injunction. Their replacement "DriveSpace" was not yet ready.

Product type
OS
Vendor
Microsoft
Release date
1994
Minimum CPU
8088
Minimum RAM
512KB
Minimum free disk space
5MB
User interface
Text
Platform
DOS

Downloads

Download Name Version Language CPU File type File size
Microsoft MS-DOS 6.21 (Upgrade) (3.5-1.44mb) 6.21 (Upgrade) Upgrade English x86 3½ Floppy 6.42MB
Microsoft MS-DOS 6.21 (Upgrade) (5.25-1.2mb) 6.21 (Upgrade) Upgrade English x86 5¼ Floppy 6.63MB
Microsoft MS-DOS 6.21 Plus Enhanced Tools (3.5-1.44mb) 6.21 English x86 3½ Floppy 3.98MB
Microsoft MS-DOS 6.21 Plus Enhanced Tools (5.25-1.2mb) 6.21 English x86 5¼ Floppy 3.98MB

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