| Type | proprietary software, operating system |
|---|---|
| Developer | BBN Technologies |
| First release | 1969 |
| Platforms | PDP-10 |
Sources: Wikidata (CC0) · Wikidata Q2992529
Operating systems · 1
| Operating system | Developer | First release | License |
|---|---|---|---|
| TOPS-20 | Leonard Bosack, Daniel Murphy, Digital Equipment Corporation | 1976 | — |