# Payments Fundamentals

Learn about payment processing and industry concepts.

## Categories

- [PCI Compliance](https://support.payroc.com/en-US/payments-fundamentals/pci-compliance.md) — Learn how to comply with PCI rules and keep your systems secure.
- [CEDP](https://support.payroc.com/en-US/payments-fundamentals/cedp.md) — Learn more about Visa’s Commercial Enhanced Data Program (CEDP).
- [Disputes](https://support.payroc.com/en-US/payments-fundamentals/disputes.md) — Learn more about the dispute process.
- [Surcharges](https://support.payroc.com/en-US/payments-fundamentals/surcharges.md) — Learn more about credit card surcharges and how to set them up.

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From [Payroc Support](https://support.payroc.com/en-US/payments-fundamentals). Every page is listed in [llms.txt](https://support.payroc.com/llms.txt).