Automatic Data Processing, Inc.

Automatic Data Processing (ADP) handles payroll and human resources work for millions of businesses across the world. They offer software that small businesses use to manage payroll and basic HR tasks, along with more complex systems that large companies use to track employees, manage pay, handle benefits, and keep worker data. ADP also works directly with some companies under a co-employment arrangement, meaning ADP is technically the employer of record and handles all the HR and payroll work on their behalf. The company has been in this business since 1949.