- April 23rd Stanford Hero Lecture + IEEE SV Tech History + 50th Anniversary of Moore's Law
- Aprimo
- Apriso
- APRSoft Technologies
- APS Tech
- Aptana
- Aptana Studio
- ApTask
- Aptelis, Inc.
- Aqeri Holding AB
- Aquatic Informatics Inc
- Aquazone 2: Open Water
- Aquilent, Inc
- Aquote-AccEdit
- Aralco Point of Sale Systems
- Aras Corp
- Arbitech, LLC.
- Arbitron
- Arbor Networks
- ARC IT Services.
- Arcada
- ArcGIS
- Archaic Computer Gallery
- Archer Technologies
- Archetris Inc.
- ArchiCAD
- Archiexpo
- ArchiOffice
- Archipelago Learning
- Architel
- Archon Information Systems
- Archon Systems
- Archos
- Arcline (2000) Inc
- ARCNET
- ARCOS
- ArcSight
- ArcSoft
- Arctic Cooling
- Arctic Freezer i30
- Arctic Freezer i30 CO
- Arcurve Inc
- Ardence
- Ardent Computer
- ArdentMC
- Ardom Telecom Private Limited
- Are Americans in danger of losing their Internet?
- Area-51 ALX
- Areca
- AremisSoft Corporation
- Ares International Corp
- Arescom, Inc.
- Argent Associates LLC.
- ARGO Data Resource Corporation.
- Argon Networks Inc.
- Argonaut Games
- Argosy Research Inc
- ARI Network Services Inc
- Aria Networks
- Aria Solutions Inc.
- Arian Systems Ltd
- Ariantec Global Bhd
- Aricent Group
- Arimasa Naitoh
- Aris Global
- Arisem
- Arista Networks
- Arizona Colocation
- Ark
- Ark Technology Inc.
- Arkadin
- Arke Systems LLC
- Arkeia Software
- Arkus Inc.
- Arlene Joy Harris
- ARM
- ARM Holdings
- Armada OAO
- Armando Fox
- Armas (Mike) Clifford Markkula
- Armchair Travel Co Ltd, The
- Armedia
- Arminco
- Armor ES 560
- Armor ES 560s
- Armor TL 670
- Armor TL 670s
- Armor TL 680
- Armor TL 680s
- Armor VS 550
- Armor VS 550s
- Armorize Technologies Inc.
- Armstrong Group
- Arno Penzias
- Arnold A. Cohen
- Arnold Glasow
- Arnold I. Dumey
- Arnold Meyer Spielberg
- Arnold Oral Allen