| Company | Location |
|---|---|
| Air Dynamics | Overland Park, Kansas, United States |
| Air Products and Chemicals Inc. | Allentown, Pennsylvania, United States |
| AirGenerate | Houston, Texas, United States |
| AIRI/NANOTEC IT | Roma, Italy |
| AIT - Austrian Institute of Technology GmbH | Vienna, Austria |
| AIXTRON AG | Herzogenrath , Germany |
| AJA International, Inc. | North Scituate, Massachusetts, United States |
| Akustica Inc. | Pittsburgh, Pennsylvania, United States |
| Akzo Nobel Chemical | Arnhem, Netherlands |
| Al Shultz Technology Advertising | San Jose, California, United States |
