- a display
- A-connection
- a-supply
- abampere
- abbreviations
- abohm
- absolute ampere
- absolute voltmeter
- absorption current
- absorption machine
- absorptive dielectric
- abstract
- AC ammeter
- AC circuit
- AC field
- AC potentiometer
- AC servomotor
- AC voltmeter
- accelerated aging
- accelerated commutation
- acceptance angle
- acceptance test
- accumulator charger
- accumulator jar
- acetate cellulose
- acetylene burner
- acetylene lamp
- aa
- ABS copolymer
- absorber
- AC adaptor
- AC amplifier
- AC arc
- ac bridge
- AC capacitor
- AC component
- AC discharge
- AC generator
- AC load
- AC machine
- AC operation
- AC power
- AC relay
- AC source
- abrasive
- abrasive disk
- absolute permeability
- absolute valence
- absorbing
- absorption inductor
- absorption spectroanalysis
- AC animeter
- AC output
- AC resistance
- AC supply
- AC switching
- AC voltage
- accelerating anode
- accent light
- accessories
- accident prevention
- accelerating voltage
- accelerator
- access time
- account holder
- acid
- acid funnel
- acid-resistant
- accumulator
- accumulator charge
- accumulator discharge
- accumulator house
- accumulator plate
- Acheson furnace
- acid accumulator
- acidimeter
- acoclor
- acorn tube
- activation overvoltage
- activator
- active coal
- active component
- active energy
- active impedance
- active material
- active network
- active potential
- active power
- active quadripole
- actuated button
- actuator
- acidic medium
- acoustic controller
- acoustic energy
- acoustic sounding
- acoustics
- acrn tube
- actinism-therapy
- actual rule
- adaptation