Keypads are button based mechanisms in both System Shock and System Shock 2 that regulated entry through the doors that they controlled. They needed the code to open them or they could be hacked.

System Shock

System Shock 1 Keypad

A keypad on Citadel Station.

They are encountered by the Hacker on Citadel Station.

System Shock 2

They are encountered by SOLDIER G65434-2 on the Von Braun and UNN Rickenbacker and were

TetraCorp Keypad 2

A TetraCorp Keypad.

manufactured by TetraCorp.

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