ADP

Automatic Data Processing Inc

A maker of payroll and human-resources software, ADP runs platforms like RUN Powered by ADP for small businesses, ADP Workforce Now for mid-size and large firms, and ADP Lyric HCM for global enterprises, plus co-employment services through ADP TotalSource. It was founded in 1949 in Paterson, New Jersey, as Automatic Payrolls, Inc., and renamed itself Automatic Data Processing in 1958 after switching from manual bookkeeping to punched-card machines and mainframe computers. Fun fact: despite the "automatic" in its original name, the early work was done by hand with calculators and mechanical bookkeeping machines.