| Business | Phone |
| Applied Cad Knowledge Inc 18 Westech Dr, Tyngsboro 1879 | (978) 649-9800 |
| Autotell Systems 1 Westech Dr, Tyngsboro 1879 | (978) 649-2200 |
| Ballou Internet Svc 12 Pondview Pl, Tyngsboro 1879 | (978) 649-4895 |
| Silva Consultancy Svc Inc 61 Diamond St, Tyngsboro 1879 | (781) 272-7900 |