| Business | Phone |
| Human Computer 3209 S Brea Canyon Rd # D, Diamond Bar 91765 | (909) 839-0067 |
| V-Tek Systems 1315 Valley Vista Dr, Diamond Bar 91765 | (909) 396-5355 |
| Computer Accounting Solutions 23341 Golden Springs Dr, Diamond Bar 91765 | (909) 860-7325 |
| Diakonia Po Box 5647, Diamond Bar 91765 | (909) 861-8787 |
| E Z Bytes 23025 Paseo De Terrado # 4, Diamond Bar 91765 | (909) 612-0469 |
| Tonari 1249 S Diamond Bar Blvd # 57, Diamond Bar 91765 | (909) 396-8875 |