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

Operating Systems in 1991

Everyone

Sort by: Name Count

(since 1982) 55

(since 1988) 21

Mac OS ("Classic")

(since 1984) 12

Microsoft Windows

(since 1988) 11

(since 1981) 9

(since 1989) 8

(since 1985) 7

(since 1980) 7

(since 1980) 6

(since 1986) 6

(since 1983) 5

(since 1981) 4

(since 1988) 4

(since 1991, that's this year!) 3

(since 1990) 3

Berkeley Software Distribution

(since 1981) 3

(since 1991, that's this year!) 3

(since 1991, that's this year!) 2

(since 1982) 2

(since 1991, that's this year!) 2

(since 1986) 1

(since 1989) 1