Servo
Servo may refer to:

Mechanisms
Servomechanism, or servo, a device used to provide control of a desired operation through the use of feedback
AI servo, an autofocus mode
Electrohydraulic servo valve, an electrically operated valve that controls how hydraulic fluid is ported to an actuator
Servo drive, a special electronic amplifier used to power electric servomechanisms
Servomotor, a rotary actuator that allows for precise control of angular position
Servo (radio control), a small, cheap, mass-produced actuator used for radio control and small robotics
Servo bandwidth, the maximum trackable sinusoidal frequency of an amplitude
Servo control, the use of pulse width modulation to remotely control servos
Servo tab, a small hinged device installed on an aircraft control surface to assist the movement of the control surface

Media
Music
"Servo", a song by The Brian Jonestown Massacre from the album Give It Back!

Publications
SERVO Magazine, a monthly robotics publication

Television
Sam "Servo" Collins, a fictional character from the television series, Superhuman Samurai Syber-Squad
Tom Servo, a robot from the comedy television series, Mystery Science Theater 3000
Servo pen, a fictitious multipurpose tool used by Gary Seven in the Star Trek episode "Assignment: Earth"

Video games
Servo, a non-playable character from the computer game The Sims: Livin' Large
Servo, a playable character from the expansion pack The Sims 2: Open for Business

People
Marty Servo (1919–1969), the former world welterweight boxing champion
Jennifer Servo (1979–2002), a former news reporter

Other uses
Servo (software), an experimental web browser engine by Mozilla
Servo Robot Group, a digital vision and sensing system company
Pasporta Servo, a hospitality service for Esperantists
Servo, Australian slang for a petrol station, from a contraction of "service station"
Servotronic, speed-dependent power steering