to do then now would be retro, to do then then was very nowtro
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Technologies
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Years
Technologies in 1984
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Operating Systems in 1984
1985→
←1983
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VMS
(since 1980) 3
TSX-Plus
(since 1983) 1
SunOS
(since 1983) 2
RT-11
(since 1983) 1
MVS
(since 1984, that's this year!) 1
MS-DOS
(since 1982) 10
Mac OS ("Classic")
(since 1984, that's this year!) 5
IBM i
(since 1982) 1
CP/M
(since 1981) 9
Commodore DOS
(since 1981) 7
Berkeley Software Distribution
(since 1981) 2
Apple DOS
(since 1980) 7