- Ablate
- Acetate-base film
- Acrobat
- Active data
- Active record
- Adaptive pattern recognition
- ADC
- Additive color
- ADF
- Admissible
- AI
- AIIM
- Algorithm
- Aliasing
- Alphanumeric
- ALS
- Ambient data
- American National Standards Institute
- American Standard Code for Information Exchange
- Analog
- Analog to digital converter
- Annotation
- ANSI
- Aperture card
- Applet
- Application
- Application file
- Application file user
- Architecture
- Archival data
- Archive
- Artificial intelligence
- Application service provider
- Application software
- ASCII
- ASP
- Aspect ratio
- ASR
- Association for Information and Image Management, The
- Associative retrieval
- Attachment
- Attachment field
- Attorney notes field
- Attribute
- Audio-video interleave
- Audit trail
- Author
- Author field
- Auto function
- Autoexec.bat
- Automated litigation support
- Automated speech recognition
- Automated voice recognition
- Automatic document feeder
- AVI
- AVR
