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| Eurotherm Drives, Inc. | |
| DS GmbH | ||
| ProSoft Technology, Inc. | ||
| PROFIBUS International | ||
| Heidenhain Corporation | ||
| DataLink Technologies Group, Inc. | ||
| Belden Inc. | ||
| Siemens AG - - - | ||
| Lutze Inc. | ||
| Action Instruments, Inc. | ||
| Parijat Controlware, Inc. | ||
| SoftPLC Corporation | ||
| Axiomatic Technologies Corp. | ||
| PEP Modular Computers, Inc. | ||
| National Instruments | ||
| Synergetic Micro Systems | ||
| Moeller Electric Corporation USA | ||
| Access Profibus | ||
| Beckhoff Industrie Elektronik | ||
| Applicom International | ||
| FRABA INC. | ||
| Busware Direct | ||
| Festo Corporation | ||
| ESR Pollmeier GmbH | ||
| Entrelec Inc. | ||
| Adaptive Micro Systems, Inc. | ||
| Numatics, Inc. | ||
| Sierra Monitor Corporation SMC | ||
| Escort Memory Systems EMS | ||
| Hardy Instruments Inc | ||
| Control Techniques | ||
| ACP&D Limited | ||
| Industrial Control Communications | ||
| Weed Instrument | ||
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