P-Card Payment Card Industry Compliance (PCI Compliance)
The Payment Card Industry Standards recommends using only the last four digits of the Card Number within any storage or display systems to prevent unauthorized credit card usage and fraud. PowerSchool fully supports the standards pronounced by the PCI industry by allowing clients to set up the card definitions with just the last four digits, or the first six and last four digits of the card.
Please find more information here: https://www.pcisecuritystandards.org/documents/pci_dss_v2.pdf .