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- Alamo Refrigeration
- Alan
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- Alanco Technologies, Inc.
- Alape
- Alaris
- Alaris Medical Systems
- Alarko
- Alarm
- Alarm & Starter
- ALARM COM
- Alarm Controls Corporation
- Alarm Lock
- Alarm SAF
- Alarm.Com
- Alarmaszoom
- Alarmcom
- AlarmForce
- AlarmForce Industries
- AlarmSaf
- Alarmtech
- ALASKA
- ALAT UJI
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- ALATECH Technology
- Alaterre Furniture
- Alaxala
- AlazarTech
- Alba
- Alba Fiber Systems
- Alba Krapf
- Alba Racing
- Alba-Krapf
- Albalá Ingenieros
- Albalá Ingenieros, S.A.
- Albany
- Albarry Music
- Albasca
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- Albatron Technology
- albatros
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- Albixon
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- Alcatel
- Alcatel Canada
- Alcatel Carrier Internetworking Solutions
- Alcatel Internetworking