Servo
A servo was a multi-function device employed by Supervisors.

The servo had several functions, and served as:
 A communicator, which allowed Gary Seven to communicate with the Beta 5 computer and initiate transport.
 A personal defense mechanism. It had both a stun setting, which made its target go into a hypnotic state open for suggestion, and a  setting.
 An electronic manipulation device, which Gary Seven used to deactivate the force field keeping him in the brig of the .
 A mechanical manipulation device, with the ability to serve simple purposes such as unscrewing screws, and locking and unlocking doors.
 A sensor that could conduct medical scans and project the results holographically.

In 1968, Roberta Lincoln attempted to use the device to warn off James T. Kirk, causing Seven to snatch it from her, as, unbeknownst to her, it had been set to kill. ()

In 2024, Tallinn used her servo to scan a comatose Jean-Luc Picard's brain. ()

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