| Business | Phone |
| Ajd Data Entry Svc 10 Allstate Pky, Markham L3R 5P8 | (905) 475-0200 |
| Global Data 140 Bentley St, Markham L3R 3L2 | (905) 475-7232 |
| Hka Data Processing Ltd 3075 14th Ave #201, Markham L3R 0G9 | (905) 479-8661 |
| Sesame Technologies Inc 3950 14th Ave #507, Markham L3R 0A9 | (905) 944-9438 |
| Southport Data Systems 100 Steelcase Rd E, Markham L3R 1E8 | (905) 940-0190 |
| Uptown Data Svc Inc 1351 Rodick Rd, Markham L3R 5K4 | (905) 513-7444 |
| Cover-All Computer Svc Corp 80 Gough Rd, Markham L3R 6E8 | (905) 940-1919 |
| Data Change 250 Don Park Rd, Markham L3R 2V1 | (905) 477-4610 |