| Business | Phone |
| Zygo Corp 6363 S Country Club Rd # 101, Tucson 85706 | (520) 295-8900 |
| Sws Electronics & Computers 153 S Plumer Ave # 125, Tucson 85719 | (520) 628-1613 |
| Standard Microsystems Corp 5441 E Williams Cir, Tucson 85711 | (520) 745-0045 |
| Scatter Works Inc 4500 E Speedway Blvd # 24, Tucson 85712 | (520) 325-6322 |
| National Semiconductor Corp 6377 E Tanque Verde Rd # 101, Tucson 85715 | (520) 751-2360 |
| Opt-Tech Intl 1642 S Research Loop # 140, Tucson 85710 | (520) 731-2975 |