| Business | Phone |
| Itl Circuits 90 Don Park Rd, Markham L3R 1C4 | (905) 475-6658 |
| Network Circuits Inc 145 Riviera Dr, Markham L3R 5J6 | (905) 470-0515 |
| Pacific Arts & Designs 951 Denison St, Markham L3R 3W9 | (905) 944-1605 |
| Qms Consultants 175 Riviera Dr, Markham L3R 5J6 | (905) 474-4317 |
| React Electronics 275 Steelcase Rd E #A, Markham L3R 1G3 | (905) 474-1296 |
| Camptech Ii Circuits Inc 81 Bentley St, Markham L3R 3L1 | (905) 477-8790 |
| Circuit-Spec Inc 271 Amber St, Markham L3R 3J7 | (905) 940-6895 |
| Circuit Process Kinetics 25 Royal Crest Crt, Markham L3R 9X4 | (905) 946-0955 |
| Crest Circuit Co Ltd 2701 John St, Markham L3R 2W5 | (905) 479-9515 |
| Data Circuits 144 Gibson Dr, Markham L3R 2Z3 | (905) 477-4400 |