I have two main units, two keyboards and IBM monitor 8503 .
type computer
country USA
year 1987
os IBM PC DOS 3.30
cpu Intel 8086
speed 8 MHz
ram 640 KB
disk 3,5″ 720 KB
hd 20 MB
graphic 320×200/640×480
colors 256/2
ports monitor, keyboard, mouse, rs323, centronics