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# VMS history

Version | Time | Features (excluding HW support)
--- | --- | ---
1.0 | 1978 | first non-beta version
1.5 | 1978 |
2.0 | 1980 | basic file utilities moved from RSX PIP to native
2.1 |  |
2.2 | 1981 |
2.3 |  |
2.4 |  |
2.5 | 1980 |
3.0 | 1982 | EDT-editor, MONITOR, DECnet, standalone BACKUP, ASMP
3.1 |  |
3.2 |  |
3.3 |  |
3.4 | 1984 |
3.5 | 1984 |
3.6 | 1984 |
3.7 | 1984 |
4.0 | 1984 | clusters, split of VMSRTL, long filenames, DECnet phase IV, DCL recall/edit, C RTL, XQP, ACL's
4.1 | 1984 |
4.2 | 1985 |
4.3 | 1986 |
4.4 | 1986 | volume shadowing, TPU-editor, SMG$-routines
4.5 | 1986 |
4.6 | 1987 |
4.7 | 1987 |
5.0 | 1988 | SMP, LMF, kernel split
5.1 | 1989 | DECwindows
5.2 | 1989 |
5.3 | 1989 |
5.4 | 1990 | host-based volume shadowing
5.5 VAX | 1991 | POSIX, DECthreads, DECnet Phase V
1.0 AXP | 1992 | first version on Alpha
1.5 AXP | 1993 | cluster on Alpha, SMP on Alpha
6.0 VAX | 1993 | VIOC, C2 classification, C++ RTL
6.1 VAX & AXP | 1994 | PCSI, movefile, XQP+
6.2 VAX & Alpha | 1995 | management station, DCL$PATH
7.0 VAX & Alpha | 1995 | 64 bit support (Alpha only), kernel threads (Alpha only), fast IO path (Alpha only)
7.1 VAX & Alpha | 1996 | memory channel (Alpha only), PIPE
7.2 VAX & Alpha | 1998 | JDK (Alpha only), ODS-5 (Alpha only), COM (Alpha only), Galaxy (Alpha only)

Size of code:

VMS 3.0
  0.9 million lines
VMS 5.0
  5 million lines
VMS 5.4
  6.5 million lines
VMS 7.1
  25 million lines

(VMS including DECWindows/Motif and DECnet phase IV excluding DECnet OSI and UCX and PathWorks, countning non-only-comment non-only-blank lines, based mostly on rumours)