| Business | Phone |
| Dynamics Research Corp 355 Van Ness Ave # 200, Torrance 90501 | (310) 212-5211 |
| Dynamics Technology Inc 21311 Hawthorne Blvd # 300, Torrance 90503 | (310) 543-5433 |
| Applied Signal Technology Inc 21311 Hawthorne Blvd # 300, Torrance 90503 | (310) 543-5433 |
| Cybersystems 3820 Del Amo Blvd # 211, Torrance 90503 | (310) 214-1040 |
| Sem Solutions 20818 Wendy Dr, Torrance 90503 | (310) 540-3253 |
| A R Engineers Inc 20801 Higgins Ct, Torrance 90501 | (310) 533-1155 |
| Loyd Martin Engineering & Dsgn 2510 W 237th St # 214, Torrance 90505 | (310) 534-1776 |
| Factory Test Programming 1815 W 205th St, Torrance 90501 | (310) 373-4878 |
| Rad Engineering Co Torrance 90505 | (310) 325-9180 |
| Pfm Engineering 370 Amapola Ave, Torrance 90501 | (310) 618-8463 |