... I have used: 6502, Z80, Z8000, 68xx, 68xxx, 68HC11, 84xx, MicrochipPIC,..Intel, Operating systems: CP/M MP/M, CPM, AppleII, MSX, MSDOS, Linux, BSD, AIX, OS/9, Languages: You name it: Forth, Logo, ADA, various Basics, Perl, PHP, C,... Also I have built some computers and micros from components. ...