| Business | Phone |
| Trade Quotes Inc 675 Massachusetts Ave # 12, Cambridge 2139 | (617) 492-0600 |
| Fiserv Csw 125 Cambridgepark Dr # 20, Cambridge 2140 | (617) 354-1400 |
| Midtown Associates 15 Fallon Pl, Cambridge 2138 | (617) 547-5864 |
| Cambridge Information Svc 5 Bigelow St, Cambridge 2139 | (617) 497-7170 |
| Data Conversion Inc 238 Main St # 305, Cambridge 2142 | (617) 354-7424 |
| Jen Assoc 5 Bigelow St, Cambridge 2139 | (617) 868-5578 |