A
- address format
- address instruction
- address line
- address mapping
- address mask
- address message
- address resolution
- address scrambling
- address space
- address strobe
- address translator
- address unit
- addressable point
- addressing mode
- adequate security
- adfraud
- adjacency
- adjacency list
- adjacency matrix
- adjustment
- ADL
- ADMA
- ADMD
- administration notification message
- administrative contact
- administrative control
- administrative distance
- administrative domain
- administrator
- administrator account
- admission control
- admittance
- ADO
- ADP
- ADPCM
- ADSL
- ADSL modem
- ADT
- advanced persistent threat
- Advanced Vector Extensions
- Advanced Video Coding
- adversary
- advertising
- advisory
- adware
- AECC
- aerophotography
- aeroplane rule
- AES
- AES/EBU
