| Business | Phone |
| Bitner Cash Registers 7320 Ashcroft Dr, Houston 77081 | (713) 523-5531 |
| Time Clock Svc Co 8611 Wynlea St, Houston 77061 | (713) 643-8291 |
| Fourth Dimension Instruments 11510 Glen Lane Ct, Houston 77066 | (281) 301-2032 |
| Kronos Inc 1225 North Loop W 700, Houston 77008 | (713) 880-1225 |
| Midpoint Security 14781 Memorial Dr Ste 1637, Houston 77079 | (775) 278-5159 |