| Business | Phone |
| Advanced Technology Systems 4801 University Sq # 2, Huntsville 35816 | (256) 830-2687 |
| Analytical Mechanics Assoc 4910 University Sq, Huntsville 35816 | (256) 830-4811 |
| Keltek Systems 4801 University Sq # 2, Huntsville 35816 | (256) 837-0548 |
| Premier Professional Systems 1307 Putman Dr Nw, Huntsville 35816 | (256) 830-9688 |
| Premier Professional Systems 7047 Old Madison Pike Nw # 350, Huntsville 35806 | (256) 971-2001 |