First Data, Star Network

First Data is a provider of electronic commerce and payment solutions, and the company's chief rival is TSYS. The company's portfolio includes merchant transaction processing services; credit, debit, private-label, gift, payroll and other prepaid card offerings; fraud protection and authentication solutions; electronic check acceptance services through TeleCheck; as well as Internet commerce and mobile payment solutions. The company's STAR Network offers PIN-secured debit acceptance at ATM and retail locations.

Source: Wikipedia > First Data