These computers were often used as controllers for HP automatic test equipment, connected via the HP Instrument Bus.

RS-485 does not allow the host PC to communicate with several controllers connected to the same port simultaneously.

If you have more than one controller connected, L.E.D. indicators flash to show which player is using which controller.

To play the cartridge, one must have a controller connected to both controller ports and press start on the second player's controller.

The first ALE-family controller units were external rack mounted controllers connected to control military radios, and were rarely interoperable across vendors.

OUT: A big-screen television with four hand-held controllers connected to it.

Dual link TMDS is supported via external controller connected to the digital interface.

To play Crystal Chronicles in multiplayer mode, each player must use a Game Boy Advance as a controller, connected to the GameCube by a Nintendo GameCube Game Boy Advance Cable.

A controller, connected to Port A, is used to navigate the game's menu.