- backward read
- backward reading
- backward recovery
- backward reference
- backward search
- backward sort
- backward supervision
- automatic hyphenation
- automatic indexing
- automatic migration
- automatic pagination
- automatic punch
- automatic recalculation
- automatic redundancy
- automatic relay
- automatic selection
- automatic station
- automatic styles
- automatism
- automorphism
- Autonomous investment
- autotest program
- autumnal equinox
- auxiliary battery
- auxiliary device
- auxiliary electrode
- auxiliary equipment
- auxiliary processor
- auxiliary variable
- availability ratio
- available area
- available capacity
- avalanche breakdown
- average brightness
- averaged
- axial ratio
- axiom scheme
- axiomatizability
- axiomatize
- axis rang
- AZERTY keyboard
- automatic cutover
- automatic deletion
- automatic dialing
- automatic ejection
- automatic feed
- automatic forming
- automatic performance
- automatic polling
- automatic scan
- automatic signaling
- automatic stop
- automatic switchboard
- automatic switchover
- automatic text
- automatically
- automorphic function
- automotive engine
- autonomous action
- autonomous message
- autonomous system
- autoregressive process
- autoscaling
- autostart routine
- axial coordinates
- axial symmetry
- axial vector
- axiom completeness
- axiomatic system
- axiomatics
- axonometry
- bacterium
- bad block
- bad branching
- bad break
- bad sector
- bad track
- badge reader
- baffle paint
- baffle plate
- bailey truss
- BAK file
- balance
- balance cam
- balance confounding
- balance control
- balance functional
- balance functor
- balance growth
- balanced amplifier
- balanced armature
- balanced category
- balanced computing
- balanced confounding
- balanced converter
- balanced current
- balanced design
- balanced detector
- balanced dice
- balanced die