| Company | Location |
|---|---|
| A.M. Fitzgerald & Assoc. | San Carlos, California, United States |
| A.P.E. Research srl | Trieste, Italy |
| ABA-Invest in Austria | New York, New York, United States |
| Abadata Computer Corp. Inc. | Sebewaing, Michigan, United States |
| ABB AG | Zurich, Switzerland |
| Abbie Gregg Inc. | Tempe, Arizona, United States |
| Abbott Laboratories | Abbott Park, Illinois, United States |
| Aberdeen Group | Boston, Massachusetts, United States |
| Abgenix Inc. | Fremont, California, United States |
| ABI Research | Oyster Bay, New York, United States |
