IBM PS/2 Model 30 (8530)
Technical specifications of computer IBM PS/2 Model 30 (8530)
Manufactured by: IBM
Launched: 1987
Manufactured in 
USA
CPU: Intel 8086
Memory: 640 KB
Support: Diskette 3½"
Hard drive:
20 MB
Operating system: PC DOS 3,3
Innovations: They introduced the MCA bus and the connection
for the keyboard and mouse interface, which was also called "PS/2."
The PS/2 keyboard interface is electronically identical to the widely used PC/AT interface, but instead of the 5-pin DIN connector, a 6-pin mini-DIN connector is used.
The mouse interface is physically identical, but very different from the RS-232 used until then.
Adapters existed for both connectors.
And since both connectors (keyboard and mouse) were identical, Microsoft, with the PC 97 standard, assigned them different colors.
Today, the connection of these peripherals has been almost completely replaced by USB.
They were also the introducers of the new VGA video standard.
