A
- active recovery site
- active RFID
- active speakers
- active star
- active threat
- active window
- ActiveX
- activity diagram
- activity synchronization
- actor
- ACTS
- actual argument
- actual position
- actuator
- acyclic graph
- ad hoc connection
- ad hoc network
- ad hoc testing
- Ada
- adaptability
- adaptable system
- adapter
- adapter card
- adaptive channel allocation
- adaptive communication system
- adaptive learning
- adaptive multi-rate system
- adaptive routing
- adaptive system
- adaptivity
- ADC
- add instruction
- add time
- add-in
- add-on
- add/drop multiplexer
- adder
- addition
- additive colors
- additive manufacturing
- additive process
- address
- address alignment
- address bar
- address bus
- address computation
- address constant
- address decoder
- address farming
- address format
