| Business | Phone |
| Advanced Systems Applications 1342 Bell Ave # C, Tustin 92780 | (714) 566-0301 |
| Advanced Workpl Strategies Inc 17821 17th St, Tustin 92780 | (714) 731-3084 |
| Direct Midrange Systems Inc 1342 Bell Ave # 3c, Tustin 92780 | (714) 258-1072 |
| Dollar Computer Corp 15551 Red Hill Ave # A, Tustin 92780 | (949) 975-0552 |
| Accelerated Tech 17802 Irvine Blvd # 119, Tustin 92780 | (714) 665-0600 |
| Advanced Systems Group 150 El Camino Real, Tustin 92780 | (714) 730-7899 |
| Atlantic Computer Technologies 3002 Dow Ave, Tustin 92780 | (714) 832-0986 |
| Berkeley Soft 14742 Newport Ave # 101, Tustin 92780 | (714) 505-9530 |