- Prudential
- TRW
- Ciba-Geigy
- DHL
- Union Oil
- Cameron Iron
- GeoSource
- Radio Shack
- Panasonic
- Foodmaker
- Kraftco
- Western Union
- Equifax

- Olin Chemical
- QSI
(Scandinavian Air)
- Continental Air
- HUD
- UPS
- Texas DOC (Department of Corrections)
- Kerr-McGee
- Tenneco Oil
- Hilti
- TXI