IBM PC 5150 model numbers

Recently I came across a minor mystery—the model numbers of the original IBM PC. For such a pivotal product, there is remarkably little detailed original information from the early days.
↫ Michal Necasek

Count me surprised. When I think IBM, I think meticulously documented and detailed bureaucracy, where every screw, nut, and bolt is numbered, documented, and tracked, so much so in fact this all-American company even managed to impress the Germans. You’d expect IBM, of all companies, to have overly detailed lists of every IBM PC it ever designed, manufactured, and sold, but as it turns out, it’s actually quite hard to assemble a complete list of the early IBM PCs the company sold.

The biggest problem are the models from before 1983, since before that year, the IBM PC does not appear in IBM’s detailed archive of announcements. As such, Michal Necasek had to dig into random bits of IBM documentation to assemble references to those earlier models, and while he certainly didn’t find every single one of them, it’s a great start, and others can surely pick up the search from here.