The PCjr came in two models:
• 4860-004 - 64 KB of memory, priced at US$669 (equivalent to $2,050 in 2023)
• 4860-067 - 128 KB of memory and a 360 KB, 5.25-inch floppy disk drive, priced at US$1,269 (… See more

The PCjr chassis is made entirely of plastic, unlike the all-steel chassis of the IBM PC. A 5.25" front bay allows the installation of a 180/360K floppy disk drive. The internal floppy drive was a half-height Qume 5.25" unit; IBM al… See more

The primary OS for the PCjr was PC DOS, like the IBM PC, and it supported a large amount of PC software, with some incompatibilities.
PC DOS 2.10 is the minimum version of DOS requir… See more

IBM's first home computer was the PC, released in 1981. Within two years the PC had created a large new ecosystem of hardware and software, nearly leading the home computer market with 26% of all microcomp… See more

The press widely covered the failure of the PCjr. Although the machine's failure had little effect on IBM's revenue ($46 billion in 1984) discontinuing such a prominent product embarrassed IBM. The failure was so great th… See more