In best chronological order I can muster:
Computer hardware (owned and used)
TI-99/4A
Commodore 64
Vic-20 (Dead 64 forced this on me for a while)
Commodore SX-64
Atari 800XL
Commodore 128, 128D, and 64C
Amiga 500
MacBook (borrowed from a girlfriend)
Amiga 1000
Amiga 500+
486-DX2/66 (Windows 95/98)
Amiga 4000
Games consoles (owned, played, hacked to some degree)
Atari 2600 *
Sega Genesis/CD
Sega Nomad
NES
Atari 5200
Atari 7800
XBox *
PlayStation
Amiga CD32
* -> the only consoles I owned during its popular lifespan. All others were acquired well after "death"
Operating Systems (used, not necessarily owned, and not all remembered)
Apple ][ DOS/ProDOS
GEM/TOS (not sure what version, on Atari 520ST)
PC-DOS (IBM PS/2 and PCjr)
MS-DOS 3.3 and so on
Atari DOS/HappyDOS
Vax/VMS
OS/9 (limited exposure, but fun)
GEOS64 1.x, 2.0
IBM System/34
MacOS (really bloody old stuff)
GEOS128 2.0
AmigaDOS 1.3 - 3.9
CP/M+ v3 (Commodore 128)
OS/2
Microsoft Windows 2, 3.11 - XP
Sun Solaris 2.4, 2.5.1, 2.6, 7, 8, 9, and 10
IBM AIX (not sure what version)
Novell (v2, I think)
Various Linux: Slackware, RedHat, SuSe
Programming languages
Many dialects of BASIC (TI, AppleSoft, Apple Integer, CBM 2 and 7, GFA, AmigaBasic, System/34, and various extended BASICs)
Fortran 77 (Vax/VMS)
COBOL (System/34, CP/M+, PC, and Amiga)
RPG-II (System/34)
Pascal (CP/M+) and Turbo Pascal (PC)
ARexx (Amiga) and Rexx (AIX)
GFABasic (Atari 520ST and Amiga)
6502 machine language (C64)
TMS-9900 machine language (TI-99/4A)
Minimal C, C++ (CP/M+, Amiga, PC, Unix)
Good bit of PHP4
Enough Perl to know better
(I wish I had done more Z80 and 680x0, am working on this)
I think that covers it for me...
