PDP-10, PDP-11, IBM PC's (the original one), Sun-3 (68K based) and Sun-4 (SPARC based), Generic Intel "PC".
TOPS-10 (standard and customized), RSTS-E (customized), SunOS (BSD), Solaris (SYSV), Windows 3.11, Windows NT, Windows 2000, Windows XP, Linux.
Compilers, Data Managers (custom non-SQL), FORTRAN graphics libraries, Sales Force Automation Tools, legacy-system datamarts and reporting, office data management, Print-and-Mail tools.
PC's w/Windows, Da Intertubes, Linux, Mac, Linux again, FreeBSD,
"the other BSDs"