Heartland Payment Systems, Inc. provides debit, prepaid, and credit card processing, online payments check processing, payroll services and a growing line of industry solutions for small to mid-sized merchants. Heartland Payment Systems is currently the fifth largest credit card processor in the United States and the 9th in the world.Founded by Robert O. Carr in 1997, Heartland Payment Systems is headquartered in Princeton, New Jersey. There are also offices nationally in Texas, Colorado, Tennessee, Oregon, Indiana, and Ohio. - Source: Wikipedia
