| Business | Phone |
| Leica Geo Sys Gps 23868 Hawthorne Blvd, Torrance 90505 | (310) 791-5300 |
| Nikolakopulos & Assoc 2780 Skypark Dr # 280, Torrance 90505 | (310) 530-7277 |
| Sirenza Micro Devices 24015 Garnier St, Torrance 90505 | (310) 257-0577 |
| A J Kirkwood & Assoc 19600 S Western Ave, Torrance 90501 | (310) 787-8625 |