| Business | Phone |
| Advantest America Inc 363 Massachusetts Ave, Lexington 2420 | (781) 274-0740 |
| Codatec 401 Lowell St, Lexington 2420 | (781) 861-1240 |
| Concord Information Systems 21 Worthen Rd, Lexington 2421 | (781) 863-7200 |
| Hewlett-Packard Co 39 Winthrop Rd, Lexington 2421 | (781) 860-9331 |