Automatic bridge defense system
The automatic bridge defense system was a type of automated defense mechanism, specifically a computer-controlled defensive phaser emitter, found on the bridge of some  Federation starships during the late 2260s.

When a malevolent lifeform took control of the  in 2269, it tried to use the system to force the crew's obedience. ()

Military technology
de:Brückenverteidigungsautomatik