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A10 Networks
Abaca
Abeona Networks, Inc.
Acacia Networks
ACC (Advanced Computer Communications) (Ericsson)
Acclaim Communications, Inc. (Level One/Intel)
Accton Technology
Acresso, Inc / Citrix Systems, Inc.
Acsys, Inc. an AMP company
Adaptiv Networks
ADTRAN, Inc.
Aerohive
AFC, Inc. (Tellabs)
Agilent Technologies
Airespace, Inc. (Cisco)
Airgo Networks. Inc.
AirMagnet
AirTight Networks, Inc.
Akamai Technologies, Inc.
Akamba Corp.
ALAXALA Networks, Corp.
Alcatel
Alcatel-Lucent Enterprise
Allot Communications Ltd.
Alteon WebSystems, Inc. (Nortel)
Altiga Networks, Inc.(Cisco)
Analog Devices, Inc.
Anritsu Company
Anue Systems
Apposite Technologies
Araknis Networks
Archeo Futurus
Arctic Wolf Networks, Inc.
Array Networks, Inc.
Aruba, an HPE company
Ascend Comm. (Lucent)
Ascom Timeplex
Assured Access Technology, Inc. (Alcatel)
Astaro Corp.
Atrica Inc.
Attachmate Corp. (OpenText)
Aukua Systems Inc
Automation Anywhere, Inc.
Auvik Networks Inc.
Avaya, Inc.
Aventail Corp.
AVG Technologies
Awake Security