The author delves into the mystery of IBM PC model numbers, revealing that information about the original PC is surprisingly scarce. IBM used a numbering scheme for peripherals and accessories, but official documentation prior to 1983 is non-existent. The oldest confirmed model numbers are from March 1983, establishing key PC models like 104, 114, 164, and 174. The author presents a logical numbering scheme for 5150 PC models, decoding the meaning behind each digit in the model number. The article sheds light on the history and evolution of the IBM PC lineup, providing valuable insights into the early days of personal computing.
https://www.os2museum.com/wp/ibm-pc-5150-model-numbers/