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.
Release notes
This version was specifically released to remove DoubleSpace due to legal injunction. Their replacement "DriveSpace" was not yet ready.
Downloads
| Download name | Version | Language | Architecture | File size | Downloads |
|---|---|---|---|---|---|
 Microsoft MS-DOS 6.21 (Upgrade) (3.5-1.44mb) |
6.21 (Upgrade) Upgrade | English |
|
6.42MB | 7 |
 Microsoft MS-DOS 6.21 (Upgrade) (5.25-1.2mb) |
6.21 (Upgrade) Upgrade | English |
|
6.63MB | 3 |
|
Microsoft MS-DOS 6.21 Plus Enhanced Tools (3.5-1.44mb) |
6.21 | English |
|
3.98MB | 5 |
|
Microsoft MS-DOS 6.21 Plus Enhanced Tools (5.25-1.2mb) |
6.21 | English |
|
3.98MB | 3 |
|
Microsoft MS-DOS 6.21 Plus Enhanced Tools [Portuguese] (3.5-1.44mb) |
6.21 | Portuguese |
|
4.11MB | 6 |