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

# Core Concepts

- [Accounts](https://docs.put.com/developers/core-concepts/accounts.md)
- [Transactions](https://docs.put.com/developers/core-concepts/transactions.md)
- [Overview](https://docs.put.com/developers/core-concepts/transactions/overview.md)
- [Versioned Transactions](https://docs.put.com/developers/core-concepts/transactions/versioned-transactions.md)
- [Address Lookup Tables](https://docs.put.com/developers/core-concepts/transactions/address-lookup-tables.md)
- [Programs](https://docs.put.com/developers/core-concepts/programs.md)
- [Rent](https://docs.put.com/developers/core-concepts/rent.md)
- [Calling between programs](https://docs.put.com/developers/core-concepts/calling-between-programs.md)
- [Runtime](https://docs.put.com/developers/core-concepts/runtime.md)