a service station

1910, from servo-motor (1889), from French servo-moteur (1873), ultimately from Latin servus "slave" (see serve (v.)) + motor "mover" (see motor (n.)).

to watch over, keep, protect, observe, save, reserve

A system consisting of an amplifier, actuator, and feedback element. Servos tend to control one or combination of the following variables: position, velocity and torque.  

(n) control system that converts a small mechanical motion into one requiring much greater power; may include a negative feedback system(adj) of or involving servomechanisms

V watch over; protect| store| keep| guard| preserve| save

Servo control, which is also referred to as "motion control" or "robotics" is used in industrial processes to move a specific load in a controlled fashion.

a type of motor that is only able to move 150 degrees.

A small motor connected to an RC product’s receiver unit that moves on command, so operating the control arm it is connected to, which in turn operates other working parts. Each servo is mechanically [..]

A shorter name for servomotor or servomechanism. Aerial vehicles use servomotors for various functions such as pan cameras and wing flaps adjustments which can be controlled from the ground.

A small motor with limited motion that can be controlled via transmitter. Servos are heavily used in model planes to adjust the angle of various control surfaces. On multicopters, they are of limited [..]

Also known as a servomechanism or servomotor, these are motors used in UAVs for various movement tasks.

A device which acts as a relay, usually augmenting the pilot's efforts to move a control surface, or the like.

A short notation for Servomotor.

A servomechanism or servomotor. * '''2003''', Roger Williams, ''How to Improve Triumph TR5, 250 and 6'', [http://books.google.com.au/books?id=v9Vkqp4tFEEC&pg=PA45&lpg=PA45&dq=%22servo%22|%22servos% [..]