| Business | Phone |
| Applied Research Assoc Inc 10720 Bradford Rd # 110, Littleton 80127 | (303) 795-8106 |
| Nrg Resources Systems Inc 8392 S Continental Divide Rd, Littleton 80127 | (303) 904-1326 |
| Itn Energy Systems 8130 Shaffer Pkwy, Littleton 80127 | (303) 420-1141 |