"Point-of-sale (PoS) systems have been around in one form or another for decades. Businesses in the retail and hospitality industries use these systems not only to accept payment, but to provide other operational information such as accounting, sales tracking, and inventory management.
From a security perspective, the most immediate risk to businesses and customers lies in accepting payments. The information customers hand over, if captured, can be used by cybercriminals to commit credit card fraud. Risk of exposure is the primary reason why the Payment Card Industry Security Standards Council (PCISCC) has established data security standards for organizations that handle the information of credit, debit, and ATM cardholders."