PCI DSS AuditPCI  stands for the Payment Card Industry.     

A PCI Assessment is an assessment of the security of all systems that
store, process, or transmit credit card data. The PIC assessment is based on the Payment Card Industry Data Security Standards (PCI DSS). The PCI DSS applies to all credit card payment channels, including
retail (brick and mortar), mail/telephone order, and e-commerce.<!>

History :Data Standard Security

The standard was  created by VISA  and then it became know as the PCI DSS in 2004.  Version 1.0

In Sept 2006 , Payment Card Industry Security Standards Council and PCI DSS was created and Version 1.1 of the specification was released.
In Sept 2008   PCI DSS Version 1.2 specification was released.

In Sept 2010, PCI DSS Version 1.3 specification was released.

PCI Review

The PCI compliance is a yearly assement done by the auditor evaluating the Compnays's setup based on the PCI DSS Requirements.