| Business | Phone |
| Kronos Inc 8801 J M Keynes Dr # 240, Charlotte 28262 | (704) 548-1966 |
| Automated Time Systems Inc Charlotte 28227 | (704) 545-4299 |
| Time Technologies Inc 326 Tazewell Ave Se, Charlotte 28212 | (704) 535-9107 |
| International Time Recorder Co 1801 Norland Rd, Charlotte 28205 | (704) 333-1931 |