XT may refer to any of the following:
When referring to a computer, XT (extended technology) is the name of the IBM 5160 introduced on March 8, 1983 by the IBM company. The XT was the first IBM computer with a hard drive (10 MB or 20 MB). It also had a 5 1/4" floppy drive, up to 640 KB of memory, an Intel 8088 processor, an eight-bit ISA slot, and a serial port.
When referring to any communication, XT is an abbreviation for crosstalk.
XT is also a bus introduced in 1982 that had four DMA channels, was 8-bit, and had a bus speed of 4.77 MHz.
AT, Bus, Computer acronyms, Crosstalk, Form factor, Hardware terms