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 1986
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Operating Systems in 1986
1987→
←1985
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VMS
(since 1980) 4
TSX-Plus
(since 1983) 1
System 6
(since 1986, that's this year!) 3
SunOS
(since 1983) 2
RT-11
(since 1983) 1
RSX-11
(since 1985) 1
MVS
(since 1984) 1
MS-DOS
(since 1982) 20
Mac OS ("Classic")
(since 1984) 7
IBM i
(since 1982) 1
GEOS
(since 1986, that's this year!) 3
CP/M
(since 1981) 7
Commodore DOS
(since 1981) 12
Berkeley Software Distribution
(since 1981) 2
Apple DOS
(since 1980) 10
AmigaOS
(since 1985) 4