| Business | Phone |
| L C Controls Ltd 2 Fawcett Trail, Scarborough M1B 3B3 | (416) 724-5224 |
| Ontario Process Control Svc 151 Nashdene Rd #4, Scarborough M1V 4B9 | (416) 298-8784 |
| Sintrax Instruments 3850 Finch Ave E #207f, Scarborough M1T 3T6 | (416) 385-0006 |
| Canadian Worcester Controls 20 Mid-Dominion Acres, Scarborough M1S 4A5 | (416) 298-1671 |
| Consolidated Cybernetics Cntrl 11 Progress Ave, Scarborough M1P 4S7 | (416) 292-0000 |