Category:IBM PCjr

The MS-DOSjr (read "PC junior") was IBM's first attempt to enter the market for relatively inexpensive educational and home-use personal computers. The PCjr, IBM model number 4860, retained the MS-DOS's 8088 CPU and BIOS interface for compatibility, but differences in the PCjr's architecture, as well as other design and implementation decisions, eventually led the PCjr to be a commercial failure in the marketplace.