- Aldes
- Alecto
- ALERTEGPS
- Alesis
- Alfa Romeo
- Alienware
- ALK
- ALLEN & HEATH
- Alno
- ALPATEC
- Alpha innotec
- Alpine
- Alpine Electronics
- Alto
- Amana
- Amarina
- Amazon
- American Audio
- American Hearth
- American Standard
- Amica
- AMOI
- Amplicom
- 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
- Ariston
- ARTEVINO
- ARTHUR MARTIN
- ARTHUR MARTIN ELECTROLUX
- Arthur Martin-Electrolux
- ASAHI
- Asahi Pentax