| Business | Phone |
| Computer Aid Inc 1209 Hausman Rd, Allentown 18104 | (610) 395-5120 |
| Keypunch Inc 845 W Wyoming St, Allentown 18103 | (610) 437-2400 |
| National College Management Po Box 3423, Allentown 18106 | (610) 395-0609 |
| Teradyne Inc 881 Marcon Blvd, Allentown 18109 | (610) 266-3000 |