| Business | Phone |
| Affiliated Computer Svc 4920 Campbells Run Rd, Pittsburgh 15205 | (412) 788-3700 |
| Aixon Data Svc 1910 Cochran Rd # 730-2, Pittsburgh 15220 | (412) 341-6800 |
| Behavioral Measurement Po Box 110287, Pittsburgh 15232 | (412) 687-6850 |
| Cellnet Data Svc 441 Smithfield St, Pittsburgh 15222 | (412) 393-0936 |
| Entry Time 711 Penn Ave # 203, Pittsburgh 15222 | (412) 261-1011 |
| Fiserv Inc 912 Fort Duquesne Blvd, Pittsburgh 15222 | (412) 288-1700 |
| Imat Inc 290 Perry Hwy, Pittsburgh 15229 | (412) 271-2232 |
| Innovative Systems Inc 790 Holiday Dr # 4, Pittsburgh 15220 | (412) 937-9300 |
| Kay Jay Data Sciences Inc 3401 Provost Rd # 2, Pittsburgh 15227 | (412) 885-6400 |
| Keystone Mailing Svc Inc 4777 Streets Run Rd, Pittsburgh 15236 | (412) 881-5000 |
| Kos & Assoc Inc 203 Mcknight Park Dr, Pittsburgh 15237 | (412) 367-7444 |
| Triangle Systems Inc 300 Bilmar Dr # 100, Pittsburgh 15205 | (412) 937-9656 |