Tandon PC-AT

Year: 1990 (bios date).
Operating system: MS-DOS 6.20.
Processor: Intel 80286.
Clock speed:
RAM: 640 kB.
Hard disk: 20 MB.
External storage: 5.25" FDD.
Monitor: Monochrome.
Extras:
Peculiarities:
Still missing:
Donated by:

I can't even be sure anymore, but I think I threw or gave this one away because it was so unremarkable (and because the 8086's and 80286's kept coming).