MS-DOS MS-DOS v1.10 MS-DOS v2.11 MS-DOS v3.2 MS-DOS v3.3 MS-DOS v4.01 MS-DOS v5.00 MS-DOS v6.20 MS-DOS v6.21 MS-DOS v6.22 MS-DOS v6.22 RUS PC-DOS PC-DOS v1.1 PC-DOS v3.3 PC-DOS v4.0 PC-DOS v5.0 PC-DOS v7.0 PC-DOS 2000 OS/2 OS/2 v1.0 OS/2 v1.1 OS/2 v1.2 OS/2 v1.31 OS/2 v2.0 OS/2 v2.1 OS/2 v3.0 Windows 16-bit Windows 1.01 Windows 1.02 Windows 1.03 Windows 1.04 Windows 286 Windows 2.03 Windows 386 Windows 3.0 Windows 3.1 Windows 3.11 WG Windows 3.11 RUS Windows 32-bit Windows NT 3.5 Server Windows NT 3.5 WS Windows NT 3.51 Server Windows NT 4.0 WS Other Miraculix DELL MS-DOS v3.30 CP/M-86 v1.0 DR-DOS v7.03 Flop OS ROM-DOS v7.1 PTS-DOS v7.0 PTS-DOS 2000 RxDOS