The term Servo can refer to,

• Servomechanism - usually just shortened to servo, is a device used to affect mechanical control at a distance.
• 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.