More of a owned/installed than just installed, but..
In order owned (best I can remember):
*Commodore 64 w/ Commodore BASIC
Tandy 1000 (286 equiv?) w/ MS-DOS 3.0
*Commodore 128 w/ BASIC
*Amiga 500 w/ AmigaDos
Mac Plus w/ MacOS 6.03
White box 386/16 w/ MS-DOS 5.0
White Box 486/20 w MS-DOS 6.0
*KayPro 10 (portable! yeah right) w/ CP/M
Packard Bell P-100 w/ Win95b
Toshiba 486/12 laptop w/Win95b
Dell Dimension PII-233 w/ Win98se
*Dell Latitute PIIm-266 laptop w/Win98se
*White Box AMD 1GHz w/WinXP Pro (current)
*Macintosh LC 580 w/ MacOS 7.6.1 (picked up for $12 last week
)
(*=still own and it works!)
Note, you'll see a lacking of win3.x and nt/2k.. there's a reason for that
-JG