> For the complete documentation index, see [llms.txt](https://docs.one-cp.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.one-cp.com/reference-materials.md).

# Reference Materials

- [Currency Codes](https://docs.one-cp.com/reference-materials/currency-codes.md): Currency Codes and Minor Units
- [Tax Calculation](https://docs.one-cp.com/reference-materials/tax-calculation.md): Totals and Tax Calculation System