- digital logic
- digital map
- digital mapping
- digital matrix
- digital photogrammetry
- digital photogrammetry system
- digital photograph
- digital secret communication
- digital secret communication system
- digital signal
- digital signal processing
- digital signature
- digital system
- digital telephone network
- digital television
- digital terrain model
- digital video effect
- digital wrapper
- digit capacity
- altitude of a spherical triangle
- altitude of a tetrahedron
- always true formula
- amalgamated free product of Boolean algebras
- ambiguity problem in air combat
- American standard code for information interchange