The term servo can refer to:

• Servomechanism— usually just shortened to "servo", is a special (typically electric) motor that typically includes a velocity and/or position feedback device to effect mechanical motion for a specified distance. Can also refer to any type of self-regulating feedback system or mechanism.
• Servo amplifier — an amplifier that powers a servo actuator, sometimes called a servo drive when referring to electric servo motor type servomechanisms.
• Servo drive — a servo amplifier that powers an electric servo motor
• Another device commonly referred to as a servo is used in automobiles to amplify the steering or braking force applied by the driver. In this form this device is not a true servo, but rather a mechanical amplifier.
• Tom Servo — one of the robot characters in the Mystery Science Theater 3000 television series.
• Servo — an Australian term for gas filling stations.
• Servo — a character in the Superhuman Samurai Syber-Squad television series.
• Servo — robotic non-player character from Livin' Large and player character in Open for Business computer games/expansion packs.
• Servo — non-player character from World of Warcraft, a computer game.
• "Servo" — fictional pen-shaped multipurpose device employed by the original Star Trek series character Gary Seven, and also by his assistants in various novelizations.