Hersteller
- ADD-Master (14)
- Addo-X (1)
- Address Express (1)
- Admate (6)
- ADP (1)
- Adrema (3)
- Adressograph Multigraph (2)
- Advanced Computer (4)
- Advanced Micro Systems (1)
- Advanced Technologies (1)
- Agfa (3)
- Aitel (1)
- Alanthus (1)
- Alcatel (11)
- ALL (2)
- Allen (2)
- Alpha (3)
- Alpha Data (1)
- Alpha Numeric System (1)
- Alphacom (2)
- Alphatronic (2)
- ALPINA (5)
- Alps (2)
- Altos (2)
- Alwright Data (2)
- AM International (2)
- AM Jacquard (1)
- Amerex (6)
- American (1)
- American Datacom (1)
- Amstrad (19)
- AMT (19)
- Anadex (66)
- Anita (3)
- Anitech (3)
- Anker Data System (ADS) (17)
- Anzac Computer Equipment (8)
- Apollo (3)
- Apple (13)
- Applied Computer Systems (1)
- Ascom (3)
- ASI (1)
- Aster (1)
- Astrojet (7)
- Astron (1)
- AT&T (15)
- Atil (3)
- Aurora (6)
- Avery Zweckform (2)
- Aviv (1)
- Axis (1)
- Axonix (3)
- Azurdata (2)
