| Business | Phone |
| National Computer Systems Inc 400 Northridge Rd, Atlanta 30350 | (770) 641-4100 |
| Hitachi Data Systems 5 Concourse Pkwy Ne 950, Atlanta 30328 | (770) 673-4400 |
| Ibm 303 Peachtree Center Ave Ne, Atlanta 30303 | (404) 230-9343 |
| Ibmbcrs 4111 Northside Pkwy Nw, Atlanta 30327 | (404) 364-8200 |