IBM Personal Computer XT

The IBM Personal Computer XT, often shortened to the IBM XT, PC XT, or simply XT, was IBM's successor to the original IBM PC, factory equipped with a hard drive. It was released as IBM Machine Type number 5160 on March 8, 1983, and essentially the same as the original PC, with only incremental improvements. A new 16-bit bus architecture would follow in the AT. The XT was mainly intended as an enhanced machine for business use, though later floppy-only models would effectively replace the original model 5150 PC. A corresponding 3270 PC featuring 3270 terminal emulation was released later in October 1983. XT stands for X-tended Technology.