ADP
| Date | Clue |
|---|---|
| 2026-04-16 | Big payroll service co. |
| 2022-08-26 | Big inits. in payroll services |
| 2019-01-25 | Payroll service co. |
| 2014-10-11 | Big payroll service co. |
| 2012-12-22 | Big check-printing co. |
| 2004-02-01 | Big inits. in check processing |
| 1997-11-09 | Payroll service giant, initially |