- Amplicomms
- AMS
- AND
- Andis Company
- Angeleye
- Antec
- Anthem
- AOC
- AOpen
- APART
- APC
- APM
- Apogee
- Apple
- APRILIA
- AR THERM
- Arcam
- Archos
- ARCO
- ArcSoft
- Ardo
- Argo
- ARIANE
- Ariens
- ARIETE
- Ariston
- ARTEVINO
- ARTHUR MARTIN
- ARTHUR MARTIN ELECTROLUX
- Arthur Martin-Electrolux
- ASAHI
- Asahi Pentax
- ASCOM
- ASCOT
- Ask Proxima
- Asko
- Aspes
- ASROCK
- Aston
- ASTON THERMICA