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| Amphenol Canada | Amphenol Commercial Products | Amphenol Connex |
| Amphenol Fiber Optics Div. | Amphenol Fiber Systems | Amphenol InterCon Systems (AIS) |
| Amphenol Interconnect Prds. | Amphenol Ltd. Audio Connector Prods. Div. | Amphenol Pcd |
| Amphenol Phoenix Interconnect | Amphenol RF | Amphenol Sine Systems |
| Amphenol Spectra-Strip | Amphenol TCS | Amphenol-Tuchel Electronics |
| Ampire Corp | Amplitronix | Amplivox Sound Systems |
| AMSECO/Potter | AMtec Industries | Amulet Technologies |
| Amveco | Anachip USA | Anadigm |
| Anaheim Automation | Analog Devices | Analog Devices Signal Conditioning |
| Analog Microelectronics | Analogic | Analogic Tech |
| Analytic Systems | Anamet Electrical | Anaren |
| Anchor Bolt & Screw | Ancor Marine Grade Products | AND Displays |
| AND Optoelectronics | Anderson Electronics | Anderson Power Products |
| Andigilog | Andon Electronics | Andrew Corp. |
| Angar Scientific | Angstrohm Precision/Vishay | Anillo Industries |
| Animatics | ANR | Anritsu Co. |
| Anritsu Meter Co. of America | Ansaldo | Ansell Protective Products |
| Antec | Antenex | Antennacraft |
| Antenova | Anton Bauer | Anvil Cases |
| APC | APE | APEM Components |
| Apex Microtechnology | Apex-Cooper Power Tools | Apexx Omni-Graphics |
| Apfel | APG Cash Drawer | API Delevan |
| API Electronics |
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