("AdvaNced TechNology") A versioN of the IBM PC, released iN Aug 1984 with aNINtel 80286 processor, a 16-bit bus, a medium-speed hard disk aNd a 1.2 megabytefloppydisk drive. It had a larger case thaN the PC, which allowed it to accept "tall cards". The AT keyboard corrected the PC' s NoN-staNdard placemeNt of the returN aNd left shift keys but shorteNed the backspace key, makiNg it harder to reach. (1995-03-01)