- service interruption
- service life
- service line
- service program
- service voltage
- serving
- servo actuator
- servo amplifier
- servo computer
- servo control
- servo control mechanism
- servo function generator
- servo governor
- servo operated valve
- servo valve
- servocontrol
- servodrive
- servogear
- servomechanism
- servomotor
- servomultiplier
- servopotentiometer
- servosystem
- set
- set point
- set point command
- set value
- setting
- setting basin
- setting current
- setting depth
- setting device
- setting means
- setting range
- setting time
- shackle insulator
- shade
- shade holder
- shadow photometer
- shaft
- shaft current
- shaft generator
- shaft governor
- shaking
- shallow water cable
- shape
- shape factor
- shape parameter
- shaping circuit
- shaping filter