| Business | Phone |
| Cci Inc 5333 Commerce Square Dr, Indianapolis 46237 | (317) 865-8185 |
| Centron Systems Co 1010 E 86th St # 65k, Indianapolis 46240 | (317) 843-9663 |
| Superior Systems & Supply Inc 5602 Elmwood Ave # 221, Indianapolis 46203 | (317) 783-0353 |
| Simplex Time Recorder Co 4625 W 86th St, Indianapolis 46268 | (317) 872-1565 |
| J & T Systems Inc 4810 E 23rd St, Indianapolis 46218 | (317) 546-2966 |