auto - band
- auto document mode
- auto head cleaner
- auto lock
- Auto Multiplex
- auto service call
- auto setup unit
- AUTO SP/LP TIMER button
- Auto Store key
- Auto Vocal Fader
- auto-black shadowing
- auto-degauss cycle
- auto-edit button
- auto-excited transductor
- auto-night mode
- auto-phasing
- auto-reverse deck
- auto-stop lever
- autoanswer
- autochroma
- autoconnected transformer
- autodial
- AUTODIN
- Autodin
- autodyne transducer
- autoinduction coupling
- autoinformer
- autoinformer mode
- autolink
- autoload
- automated attendant exchange
- automated radio
- automated-information system security
- automatic accumulator charging
- automatic address selector
- automatic alarm
- automatic alarm signal receiver
- automatic alarm signal transmitter
- automatic alternate routing
- automatic announcement
- automatic answering
