The latest that existed by itself was MS-DOS 6.22. For a while, however, Windows was partially integrated with DOS, so these MS-DOS versions could be extracted. Windows 95 revision 1 identified as MS-DOS 7; Win 95 rev 2 and Win 98 were MS-DOS 7.1 (which had support for the FAT32 file system), and Windows ME had MS-DOS 8. You can extract the DOS from Win 9x (not ME) by modifying the file MSDOS.SYS, changing the line saying "bootgui=1" to "bootgui=0" and setting the config.sys SHELL statement to the command.com that came with Windows. Someone has done this and packaged it; google "MS-DOS 7.10" and you will find it.

Also, any time you format a disk in Windows newer than ME, you get the option to make a MS-DOS startup disk. This is MS-DOS 8. By making such a disk and using the utilities from MS-DOS 6.22, you can have a working MS-DOS 8. The VER command will still report the Windows version you used.

MS-DOS 1.x
- Version 1.0 (Retail) - August 1981
- Version 1.1 (Retail)
- Version 1.12 (Retail)
- Version 1.25 (Retail) - August 1982

MS-DOS 2.x
- Version 2.0 (Retail) - March 1983
- Version 2.1 (Retail)
- Version 2.11 (Retail)
- Version 2.2 (Retail)
- Version 2.21 (Retail)
MS-DOS 3.x
- Version 3.0 (Retail) - For IBM PC AT
- Version 3.1 (Retail) - For Networks
- Version 3.2 (Retail) - April 1986
- Version 3.21 (Retail) - April 1987
- Version 3.25 (Retail)
- Version 3.3 (Retail)
- Version 3.3a (Retail)
- Version 3.3r (Retail)
- Version 3.31 (Retail)
- Version 3.35 (Retail)
MS-DOS 4.x
- Version 4.0 (Retail) - July 1988
- Version 4.01 (Retail) - November 1988
MS-DOS 5.x
- Version 5.0 (Beta 1) - June 1991
- Version 5.0 (Retail)
- Version 5.0a (Retail)
MS-DOS 6.x
- Version 6.0 (Retail) - August 1993
- Version 6.1 (Retail)
- Version 6.2b (RTM)
- Version 6.2 (Retail) - November 1993
- Version 6.21 (Retail) - March 1994
- Version 6.22 (Retail) - April 1994
MS-DOS 7.x
- Version 7.0 (Beta)
- Version 7.1 (Retail)

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