IBM

IBM PS/2 Model 30-021 (my very first PC)
Intel 8086 8 MHz - RAM 640 kB
Harddisk 20 MB - Floppy Drive 3,5" 1,44 MB
MCGA 256 color video card
Sound Blaster 8 bit ISA audio card
Digital DEPCA 8 bit ISA network interface card

IBM PS/2 Model 30-002 (my very first PC)
Intel 8086 8 MHz - RAM 640 kB
Dual Floppy Drive 3,5" 720 kB
MCGA 256 color video card

IBM PS/2 Model 70
Intel 80486 Overdrive 40 MHz
RAM 16 MB - Harddisk ...
XGA video card MCA 
3COM EtherLink MCA

IBM AS/400 9401-150 #1

IBM AS/400 9401-150 #2

IBM Power 720 Express 9124-720

IBM Power System xxxx-xxx