| Business | Phone |
| A I Softworks Inc 303 Longcope Loop, San Marcos 78666 | (512) 353-3326 |
| Great Hills Management Sys San Marcos 78666 | (512) 353-1575 |
| Praxis Systems 829 N L B J Dr 208, San Marcos 78666 | (512) 392-9931 |
| Sigma Science Corp 300 Hugo Rd, San Marcos 78666 | (512) 805-8100 |