| Business | Phone |
| Garner Tek Inc 20267 Paseo Del Prado, Walnut 91789 | (909) 348-0000 |
| Roqsolid Solutions 18760 Amar Rd # 176, Walnut 91789 | (626) 549-3295 |
| Truman Computing 1989 Shaded Wood Rd, Walnut 91789 | (909) 595-2384 |
| Twincube 663 Brea Canyon Rd # 2, Walnut 91789 | (909) 869-8055 |