DOS 5 or DOS-5 may refer to:
The Soviet space station Salyut 6 DOS 5 (OS/2), one of the early project names for the then still unreleased IBM and Microsoft OS/2 1.0 between 1985 and 1987 DR DOS 5.0 MS-DOS 5.x, by Microsoft IBM PC DOS 5.x, by IBM
See also DOS (disambiguation) DOS 4 (disambiguation) DOS 6 (disambiguation) DOS/V