| Business | Phone |
| 2 R & 2 N Svc 45 Mercer Cres, Markham L3P 4K2 | (905) 294-4279 |
| 777 Electronics Systems 555 Denison St, Markham L3R 1B8 | (905) 479-1148 |
| Asco Tech 210 Cochrane Dr, Markham | (905) 305-9378 |
| Tonly Electrical Svc 398 Ferrier St, Markham L3R 2Z5 | (905) 470-1268 |
| Voltmatic Inc 226 Steelcase Rd W, Markham L3R 1B3 | (905) 947-0660 |
| Dianex Electronics 590 Alden Rd, Markham L3R 8N2 | (905) 474-1293 |
| Ensil Canada Ltd 205 Torbay Rd, Markham L3R 3W4 | (905) 709-2222 |