AT
Provided by the ASK Keyboard Dictionary
"AT" can refer to multiple things associated with the IBM 5170 Personal Computer AT, its derivatives and third-party clones.
- "Model F/AT": the modern nickname for the IBM Personal Computer AT Keyboard.
- AT connectivity/protocol: the combination of a 5-pin DIN plug, 11-bit "Mode 2" serial data packet, and IBM scancode set 2.
- AT layout: the IBM Personal Computer AT Keyboard's layout.