• A&B Design
• Abbott Electronics
• Abekas Video Systems
• Abracon
• Abstract Technologies
• Acapella, Ltd ( owned by Semtech )
• ACC Systems
• AccelGraphics
• Acer
• Actel
• Adaptive Logic
• Adaptec, Inc
• ADC Telecommunications
• Adcom
• Ademco
• Advanced Communication Devices
• Advanced Hardware Architectures
• Advanced Interconnections Corp.
• Advanced Linear Devices / ALD
• Advancel Logic Corporation
• AdvanceTec
• Adtran
• Advanced Logic Research / ALR
• Advanced Micro Devices / AMD ( also see Vantis )
• Advanced Micro Systems
• Advanced Power
• Advanced Power Technologies / APT
• Advanced RISC Machines
• Advanced Storage Concepts
• AdvanSys
• AEG Schneider Automation
• AEG/Telefunken ( merged with Temic )
• Agile Networks
• AIM
• AKM Semiconductor
• Aladdin Knowledge Systems
• Alantec
• Alden Electronics
• Aleph International Corp.
• Alesis Semiconductor
• Allegro Microsystems
• Allen-Bradley
• Alliance Semiconductor
• Allied-Telesis
• Alpha
• Alpha Industries
• Alpha Metals
• Alpha Technologies
• Alps Electric USA
• Alta Technology
• Altech Corp.
• Altera
• ALToptronic AB
• Amber Wave Systems
• AMCC / Applied Micro Circuits Corporation
• Amdahl
• American Megatrends
• American Microsystems / AMI
• American Power Conversion / APC
• American Precision Industries
• Amitron
• Amplifonix
• ARI - American Reliance Inc
• Amitron
• AMP Industries
• Amphenol
• Amplifonix Inc.
• Anadigics
• Analog Devices
• Anaren Microwave
• Ancor Communications
• Anderson Power Products
• Angle Linear
• Antona Corp.
• Anton Bauer
• Apcon.
• APEM Components
• Apex Microtechnology
• API Electronics
• Apple
• Applied Innovation
• Applied Microsystems Corporation
• APS Technologies
• Aptos Semiconductor
• ARC Cores
• Arcolectric Switches
• Argus Technologies
• ARK Logic
• ARM Holdings, Ltd
• Ariel Corporation
• Aries Electronics.
• Aromat (also known as NAIS, owned by Matsushita)
• Array Microsystems
• Asante Communications
• Ascom Timeplex
• Asicom Technologies
• Aslan Computer
• Aspen Systems, Inc
• Assembly Contracts Ltd
• Associated Components Technology
• Associated Professional Systems
• AST
• Astec America
• ASUS
• ATI Technologies
• AT&T Microelectronics ( now Lucent Technologies )
• Atek Electronics
• Atmel
• Atomata, Inc
• AUE
• Aureal, Inc. ( out of business ? )
• Auspex Systems,Inc
• AutoCap Solutions, Inc.
• Automated Computer Technology.
• Autotest Company
• Avaika Networks Corporation
• Avance Logic ( owned by RealTek ? )
• Averlogic Technologies
• AVM of America
• AVX Corporation ( mostly owned by Kyocera )
• Avtech Electrosystems Ltd
• Axis Communications
• Aztech Labs