sign - snap
- sign bit
- sign character
- sign off
- sign selection
- sign-off
- sign-on
- sign-on file
- sign-on procedure
- signal
- signal amplifier
- signal amplitude
- signal analyser
- signal analysis
- signal analyzer
- signal attenuation
- signal channel
- signal clipping
- signal comparison
- signal component
- signal connection
- signal content
- signal current
- signal distortion rate
- signal duration
- signal electrode
- signal element
- signal envelope
- signal frequency
- signal generator
- signal ground
- signal ID
- signal indicator
- signal inversion
- signal lamp
- signal lamp panel
- signal level
- signal loss
- signal mixer unit
- signal noise
- signal output current
