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Research Unix
5 operating systems
Research Unix — operating system
| Operating system | Developer | First release | License |
|---|---|---|---|
| Version 10 Unix | — | — | — |
| Version 6 Unix | Bell Labs | 1975 | 4-clause BSD License, proprietary license |
| Version 7 Unix | — | — | 4-clause BSD License |
| Version 8 Unix | — | — | — |
| Version 9 Unix | — | — | — |