This is an archival site
Early versions of the UNIX* system
At Berkeley, as elsewhere, computer scientists started "improving" UNIX, adding new features and applications, revising code, trying to push this versatile operating system to its limits. Over time, a number of versions of UNIX were floating around, including Bell Labs official versions.
Early versions of the UNIX* system
| Version | Year released | Applications |
| Version 6 | 1975 | Universities |
| Version 7 | 1978 | Universities and commercial. The basis for System V. |
| System III | 1981 | Commercial |
| System V, Release 1 | 1983 | Commercial |
| System V, Release 2 | 1984 | Commercial, enhancements and performance improvements |
| Version 8 | 1985 | Universities |
| Version 9 | 1986 | Universities |
| Version 10 | 1989 | Universities |
In addition, there are several university versions, the most important being the UNIX-Berkeley BSD distributions.
Next: The UNIX wars
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![[ UNIX building blocks ]](images/86-300838-EM.jpeg)