1. ABB Ltd.
2. Acromag
3. Advantech Co. Ltd.
4. Azbil Corporation
5. B&R Industrial Automation GmbH
6. Eaton Corporation PLC
7. Emerson Electric Co.
8. General Electric Company
9. Hitachi
Ltd.
10. Mitsubishi Electric Corporation
11. National Instruments Corporation
12. Omron Corporation
13. Rockwell Automation Inc.
14. Siemens AG
15. Yokogawa Electric Corporation