Hello, I'm Allison and I've been invloved with microcomputer since the introduction of the MCS8 (8008) and computers in general since the PDP-8. On site I have... they are all operational: DEC made: VT180 (cpm/zcpr) PDP-11/23 (RT-11 os) PDP-11/23+ (RT-11 os) PDP11/73 (RSTS or RT-11 os) PDT-11/130 (RT-11) MicroVAX2000 (Currently VMS5.4 later netbsd) MicrovaxII/gps (Currently VMS5.4 later netbsd) CPM and S100 systems: Northstar* s100 z80 (CP/M/zcpr, 40 meg hard disk) S100 (vector chasis) computime z80 and misc s100 cards (cpm/zcpr) SB180 (CPM2.2/zcpr 3.5" floppies and 20meg hard disk) Ampro Little board (CP/m/ZCPR 3.5" floppies and 42meg hard disk) Explorer85 8085 (NS*dos cpm1.4) Epson PX8 geneva with 120k ramdisk and 64k ramdisk/300baud modem wedges (runs cpm from rom) Kaypro 4/84 (turborom and CPM) MITS Altair 8800 (I built this one in late 74, one of the early units) Misc Single board computers (demo boards) Intersil 6960 mdemo board, 6100 chip 12bit PDP-8 on a chip National Semi ISP8a500 low cost 8 bit cpu. Technico Inc board using texas instruments TI9900 chip 16 bit (also have a TI99/4A with w/expansion box and software) Motorola 6800D2 board National Semi Nibblebasic chip (CPU with rom basic on a chip) Original cosmac elf. RCA1802 IMSI IMP48 8035 cpu NEC TK80 8080 demo board. PCs Leading edge model D 8088 (dos) (several other PCs far too new (less than 10 years). Plus parts (8080s, 8085, 8088, peripheral chips, rams...) CPU chips 8080, 8085, 8086, 8088, 80188, 80186, 808286, z80s, 6800s, 6502, 1802, 6100, 6120(pdp8), 8748, 8035, 8749, 8039, 8751, 8031, T11chip (pdp11 on a chip), NECd78pg11, NEC d7800 Allison