- 3M
- 999
- Aastra
- Abarth
- ABBYY
- Abit
- Ableton
- ACDSee
- ACDSee Gestionnaire
- ACDSee Photo
- ACEC
- Acer
- ACOMAX
- Acomdata
- Acoustic Energy
- Acova
- ACP
- ACRONIS
- Acroprint
- Actron
- ACU-RITE
- Acura
- AcuRite
- Adam
- Adam Equipment
- Adidas
- ADLY
- Adobe
- ADT
- ADURO
- ADYX
- AEG
- AEG Electrolux
- AEG Powertools
- Aeg-Electrolux
- AFK
- AG Neovo
- AGA
- AGFA