to do then now would be retro, to do then then was very nowtro

Operating Systems in 1990

Everyone

Sort by: Name Count

(since 1982) 47

(since 1988) 19

Mac OS ("Classic")

(since 1984) 10

(since 1981) 10

Microsoft Windows

(since 1988) 10

(since 1980) 8

(since 1980) 8

(since 1989) 7

(since 1985) 6

(since 1986) 6

(since 1981) 4

(since 1988) 4

(since 1983) 4

Berkeley Software Distribution

(since 1981) 3

(since 1982) 2

(since 1990, that's this year!) 1

(since 1986) 1

(since 1989) 1