# Concepts

- [BEEF](https://docs.bsvblockchain.org/guides/sdks/concepts/beef.md)
- [Fees](https://docs.bsvblockchain.org/guides/sdks/concepts/fee.md)
- [SPV](https://docs.bsvblockchain.org/guides/sdks/concepts/spv.md)
- [Transactions](https://docs.bsvblockchain.org/guides/sdks/concepts/how_tx.md)
- [Op Codes](https://docs.bsvblockchain.org/guides/sdks/concepts/op.md)
- [Script Templates](https://docs.bsvblockchain.org/guides/sdks/concepts/templates.md)
- [Signatures](https://docs.bsvblockchain.org/guides/sdks/concepts/tx_sig.md)
- [Verification](https://docs.bsvblockchain.org/guides/sdks/concepts/tx_valid.md)