Works and fits Atari ST Computer. No drivers required just plug and play.
This can also be used on an Amiga 500 600 1200 2000 3000 4000 computers but simply changing the jumpers on the board (soldering required).
Please note must be used with a PS/2 mouse or a USB mouse that has native PS/2 support VIA a convertor such as a Microsoft Intellimouse.