Just how Many Things Does the Term “Keyboard Layout” Refer to?
Keyboard scancodes: Special keyboards - XT keyboards
楽天市場】PS / 2からATへのキーボードケーブルアダプタ-6ピンミニDinオスから5ピンのMIDIメスキーボードアダプタ GLHONG PS/2 to AT Keyboard Cable Adapter - 6 Pin Mini Din Male to 5 Pin MIDI Female Keyboard Adaptor : Glomarket
How to Type At Symbol On Keyboard (Windows & Mac) - Software Accountant
What is AT?
File:AT keyboard original layout.png - Wikimedia Commons
IBM PC/AT 84 Keyboard
Original IBM PC AT Keyboard, Thoroughly Cleaned and ANSI Modified with Soarer's Converter – Brand New Model F Keyboards