| Business | Phone |
| Black & Hurlburt Engineering 1050 E Whittier Blvd, La Habra 90631 | (562) 691-1070 |
| Data Integrity Systems Group 2210 Vaquero Ave, La Habra 90631 | (562) 905-0166 |
| I R Development Co 1205 Sunbird Ave, La Habra 90631 | (562) 697-3026 |
| Mas Production Support La Habra 90631 | (562) 697-8140 |