Operating systems of the 1970s
Every operating system in the Atlas that first appeared in the 1970s — 10 entries.
| Name | Years | Status | Family | Creator / origin |
|---|---|---|---|---|
| RSTS/E | 1971– | Dead | Independent | DEC |
| RSX-11 | 1972– | Dead | Independent | DEC |
| z/VM | 1972– | Alive | VM | IBM |
| RT-11 | 1973– | Dead | Independent | DEC |
| CP/M | 1974–1983 | Dead | CP/M | Gary Kildall / Digital Research |
| MVS | 1974– | Superseded | OS/360 | IBM |
| TOPS-20 | 1976– | Dead | Independent | DEC |
| BSDBerkeley UNIX, 4.3BSD | 1977– | Superseded | BSD | UC Berkeley CSRG |
| OpenVMSVMS | 1977– | Maintenance | VMS | DEC → VSI |
| Apple DOS | 1978–1983 | Dead | Independent | Apple / Paul Laughton |