NeXTSTEP 0.8 1988 NeXT NeXTSTEP 0.9 1988 NeXT NeXTSTEP 1.0 1989 NeXT NeXTSTEP 1.0a 1989 NeXT NeXTSTEP 2.0 1990 NeXT NeXTSTEP 2.1 1991 NeXT NeXTSTEP 2.2 199? NeXT NeXTSTEP 3.0 1992 NeXT NeXTSTEP 3.1 1993 NeXT NeXTSTEP 3.2 1993 NeXT NeXTSTEP 3.3 1995 NeXT NeXTSTEP 4.0 1996 NeXT OPENSTEP 4.0 1996 NeXT OPENSTEP 4.2 1997 NeXT