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| 2E Mechatronic GmbH | 3-V Fasteners | 3Com |
| 3D Instruments | 3L Global | 3M Abrasives |
| 3M Canada Electrical Products Div. | 3M Canada Electrical Products Heat Shrink | 3M Canada Electronic Market Products (EH&PD) |
| 3M Canada Electronic Market Products (EPD) | 3M Canada Electronic Market Products (ESM) | 3M Communication Markets Div. |
| 3M Electrical Products Div. | 3M Electrical Products Specialty Distribution | 3M Electronic Solutions |
| 3M Electronic Specialty Markets | 3M Interconnect Solutions | 3M Touch Systems |
| A-Cap Electronics | A.C.T. Connectors | A.J. Tuck Co. |
| A.O. Smith Electrical Products | A.W. Sperry Instruments | AAEON Electronics |
| AAEON Systems | AAK | Aaliant Fluid Measurement Solutions |
| Aavid Thermalloy | AB Connectors Ltd | ABB Automation Tech. Drives & Motors |
| ABB Inc. | ABB Inc. Low Voltage Products | ABB Instrumentation |
| ABB Semiconductor | Abbatron/HH Smith | Abbotec |
| AbelConn LLC | Abracon | Abs-Vabsco Electronic Components |
| Absolute Process Instruments | Absolute Semiconductor Products | Absopulse Electronics |
| AC Data Systems | AC Tech | Acbel |
| ACCES I/O Products | Acctech Industrial Div. | Accu-Sort Systems |
| Acculite Mfg. | Accurate Screw Machine (ASMCO) | Accuride |
| Accutech/Adaptive Instruments | ACE Controls | Acer America |
| ACL/Staticide | Acme Electric | Acme Electric Power Distribution Prods. |
| Acme Electronics | Acme Industrial | Acme United |
| Acon | Acopian | Acoustone |
| ACP | ACP Precision Timer | ACR Systems |
| Acra Electric |
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