File:IBM PS-Note 425 (ThinkPad 350C).jpg - Wikipedia
IBM PS/55 - Wikipedia
IBM PS/2 - Wikipedia
Tandy 1000 - Wikipedia
File:IBM PS2 MCA Model 55 SX, power supply, memory, riser base.jpg - Wikimedia Commons
IBM PS/2 (Model 70) - Technical Specifications
IBM PS/2 - Wikipedia
Personal System/2 – Wikipedia
The PS/2
File:IBM PS2 MCA Model 70, internal chassis, no drives.jpg - Wikipedia