| Business | Phone |
| Empor Inc 736 Johnson Ferry Rd C270, Marietta 30068 | (770) 971-4554 |
| Expert Netcad Solutions Inc 1509 Johnson Ferry Rd, Marietta 30062 | (770) 579-3688 |
| Precision Design Assoc 736 Johnson Ferry Rd C270, Marietta 30068 | (770) 971-4490 |
| Kirkpatrick Engineers 2141 Kingston Ct Se 111, Marietta 30067 | (770) 933-8842 |