| Name | Booth |
|---|---|
| abcr GmbH | 1309 |
| Accurion, Inc. | 617 |
| Across International LLC | 609 |
| ACS Publications | 125 |
| Admiral Instruments | 1020 |
| AdValue Technology, LLC | 604 |
| Advanced Polymer Materials Inc. | 325 |
| Advanced Research Systems, Inc. | 316 |
| AIP Publishing | 117 |
| AJA International, Inc. | 501 |
| Alemnis AG | 1209 |
| Allevi, Inc. | 905 |
| Allwin21 Corp. | 710 |
| American Physical Society | 106 |
| Anasys, now Bruker | 300 |
| ANCORP | 511 |
| Andeen-Hagerling, Inc. | 420 |
| Angstrom Engineering Inc. | 1029 |