| Business | Phone |
| Yam Technologies 122 Mount Auburn St, Cambridge 2138 | (617) 876-1724 |
| Boston Networking Co 545 Cambridge St # 2, Cambridge 2141 | (617) 876-9600 |
| Computer Breakthrough Inc 101 Blanchard Rd, Cambridge 2138 | (617) 354-7303 |
| Eli Inc 288 Norfolk St, Cambridge 2139 | (617) 547-4005 |
| Journeyman Systems 263 Pearl St, Cambridge 2139 | (617) 492-9600 |