1990-10-23   OSF/1 Version 1.0

1992-01-22   DEC OSF/1

1993-03-17   DEC OSF/1 V1.2 for Alpha AXP

1994-02-08   DEC OSF/1 V2.0 with System V Environment extensions

1995-03-14   Digital to Rename DEC OSF/1 Operating System "Digital Unix"