1981 – Unix System III
1983 – Unix System V
1988 – Unix System V/386 Release 3.2
1989 – Unix System V Release 4
1990 – UNIX System V Release 4 Multi-lingual
1991 – UNIX System V Release 4 Multi-Processor Version 1
1992 – UNIX System V Release 4.2 (SVR4.2)
1993 – UnixWare 1.1
1995 – UnixWare 2
1996 – UnixWare 2.1
1998 – UnixWare 7
1999 – UnixWare 7 Data Center Edition
2001 – Open UNIX 8