The iconic IBM 5150 Personal Computer. This is one of the earliest models with 16-64k memory board, original black box power supply and no hard drive installed. It is shown here with the ultra-rare dust cover plate installed over the floppy disk drive bays. The hard drives were contained in the IBM 5161 Expansion Unit, which is shown further down the page.
1982 IBM 5150 Personal Computer
Below are the cards installed in this particular unit, which was owned by an IBM engineer.
The original "Analog Interface" card was replaced at some point with a slightly newer AST Six Pak Plus card.
The IBM 5161 Personal Computer Expansion Unit...
The 5161 connects to the 5150 via the Receiver Card (shown installed above near the power supply). Below is the IBM Extender Card, which needs to be installed in the IBM 5150 to connect to the 5161 Expansion Unit.
We'll have more stuff about the IBM 5150 to come.