XT

1. When referring to a computer, XT is short for eXtended Technology and is the name of the IBM 5160 computer introduced on March 8, 1983. The XT was the first IBM computer with a a hard disk drive (10MB with the option for a 20MB), a 5 1/4" floppy drive, had up to 640kb of memory, used an Intel 8088 processor, an eight bit ISA slot, a serial port, and ran on .
2. When referring to any type of communication, XT is an abbreviation for crosstalk.
3. XT is also a type of bus that was introduced in 1982 and had four DMA channels, was 8-bit, and had a bus speed of 4.77 MHz.

Also see: AT, Bus, Crosstalk, Form factor