| Business | Phone |
| A Computer Electronics Supply 584 W 22nd St, Upland 91784 | (909) 985-0518 |
| Acr Computer Haven 957 W Foothill Blvd, Upland 91786 | (909) 985-2101 |
| Advanced Computer Resources 957 W Foothill Blvd, Upland 91786 | (909) 985-3278 |
| Alpha Business Systems 140 N Benson Ave, Upland 91786 | (909) 608-7660 |
| Alternative On-Site Svc 1048 W 22nd St, Upland 91784 | (909) 985-8861 |
| Computek 80 E Foothill Blvd, Upland 91786 | (909) 931-3412 |
| Computer Haven 957 W Foothill Blvd, Upland 91786 | (909) 982-5940 |
| Cornice 615 N Benson Ave # H, Upland 91786 | (909) 985-8323 |
| Custom Built Solutions Upland 91786 | (909) 949-1436 |
| Jenkco Inc 356 E Foothill Blvd # D, Upland 91786 | (909) 920-9799 |
| Kevco Computers 475 W 26th St, Upland 91784 | (909) 946-1926 |
| Lightning Speed Computers 1019 W Foothill Blvd, Upland 91786 | (909) 946-8752 |
| Canon Computer Systems 575 N Central Ave, Upland 91786 | (909) 946-7354 |
| Eternal Computer 631 E Foothill Blvd, Upland 91786 | (909) 931-2155 |
| P C House Upland 273 N Mountain Ave, Upland 91786 | (909) 982-2501 |
| Pacific Computer 1651 W Foothill Blvd # F, Upland 91786 | (951) 377-6481 |
| Payless Computer 1445 E Foothill Blvd, Upland 91786 | (909) 985-7777 |