ante - asyn
- area array surface mounted package
- area array tape-automated bonding
- area chart
- area code
- area communication center
- area control radar
- area cosecant
- area cosine
- area cotangent
- area density
- area exchange
- area graph
- area histogram
- area navigation
- area of circle
- area of picture element
- area of polygon
- area of science
- area recording density
- area search
- area secant
- area sine
- area tangent
- area-delta and zero-cross modulation
- area-extensive target
- areal beamwidth
- areal density
- areal recording density
- Arens prism
- Argand diagram
- Argon
- argon laser
- argon-filled thyratron
- arguable exception
- argument
- argument list
- argument matching
- argument separator
- ARI
- ARIMA
