1. ABB Ltd.
2. Bentek Systems Ltd
3. Eaton Corporation PLC
4. Emerson Electric Co.
5. General Electric Company
6. Hitachi
Ltd.
7. Honeywell International Inc.
8. Mitsubishi Electric Corporation
9. Motorola Solutions Inc.
10. Omron Corporation
11. Open Systems International Inc.
12. Schneider Electric SE
13. Siemens AG
14. Toshiba Infrastructure Systems & Solutions Corporation
15. Yokogawa Electric Corporation