- Abelian collection
- abelian group
- abnormal polarization
- abnormal propagation
- abnormal refraction
- abnormal singularity
- abnormal statement
- abnormal termination
- abort sequence
- above average
- abridged division
- abridged version
- absolute coding
- absolute constant
- absolute convergence
- absolute delay
- absolute inequality
- absolute loader
- absolute maximize
- absolute priority
- absolute program
- absolute tension
- absolutely closed
- absorb
- absorbed power
- absorber
- absorbing set
- absorption modulation
- absorption spectrum
- absorptivity
- abstract class
- abstract game
- abstract mathematics
- abstract number
- abridge multiplication
- abridged notation
- absolute basis
- absolute concept
- absolute geometry
- absolute probability
- absorption control
- absorption link
- absorption surface
- abstract automaton
- abstract page
- abstract syntax
- abstract-association
- absurdity
- acceleration
- accelerator card
- acceptable
- acceptance function
- acceptor impurity
- acceptor state
- access authorizations
- access capability
- access category
- access control
- access cycle
- ACCESS directory
- access exception
- access fee
- access level
- access lock
- access mechanism
- access path
- access permissions
- access point
- access provider
- access slot
- accessible
- accessible subgroup
- accession
- accident
- accidental convergence
- accidental error
- accidental variance
- accommodation time
- account card
- account processing
- accounting device
- accounting entry
- accounting file
- accounting package
- accounting period
- accounting routine
- accelerator
- accent
- accented character
- acceptance line
- acceptance number
- acceptance testing
- accepted lot
- access
- access authority
- access charge
- access information
- access key
- access line
- access log