IBM PC AT

computer ("Advanced Technology") A version of the IBM PC,

released in Aug 1984 with an Intel 80286 processor, a 16-bit

bus, a medium-speed hard disk and a 1.2 megabyte

floppy 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 of

the return and left shift keys but shortened the backspace

key, making it harder to reach.

(1995-03-01)