Wiki: The IBM PCjr (read “PC junior”) is a home computer that was marketed by IBM from March 1984 to May 1985. … It retains the IBM PC’s 8088 CPU and BIOS interface, but provides enhanced graphics and sound capabilities over the original IBM PC, ROM cartridge slots, joystick ports, and an infrared wireless keyboard. … Despite widespread anticipation, the PCjr’s launch was unsuccessful. … By January 1985, when the discounts ended, IBM had sold 250,000 PCjr computers, with 200,000 in the fourth quarter of 1984 alone.
IBM PCjr
https://en.wikipedia.org/wiki/IBM_PCjr
