Video Touch Pad (CX21)
This picture shows the "Video Touch Pad" (CX21). It had 12 buttons which had different functions dependent on the game you played. It was with such cartridges like "Star Raiders" or "Basic Programming". There was the possibility to put overlays over the keypad. The "Video Touch Pad" was a later version of the Atari "Keyboard" controllers (CX50) shown above.