IBM PC AT

IBM PC AT

(computer)("Advanced Technology") A version of the IBM PC,released in Aug 1984 with an Intel 80286 processor, a 16-bitbus, a medium-speed hard disk and a 1.2 megabytefloppy disk 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 ofthe return and left shift keys but shortened the backspacekey, making it harder to reach.