> For the complete documentation index, see [llms.txt](https://whitepaper.readon.me/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://whitepaper.readon.me/read-fi-token-economy/core-concepts.md).

# Core Concepts

- [Content, Topics, NFTs and Tokens](https://whitepaper.readon.me/read-fi-token-economy/core-concepts/content-topics-nfts-and-tokens.md)
- ["Catto" NFT](https://whitepaper.readon.me/read-fi-token-economy/core-concepts/catto-nft.md)