# The Orchard Book
[Orchard](README.md)
- [Concepts](concepts.md)
- [Preliminaries](concepts/preliminaries.md)
- [User Documentation](user.md)
- [Creating keys and addresses](user/keys.md)
- [Creating notes](user/creating-notes.md)
- [Spending notes](user/spending-notes.md)
- [Integration into an existing chain](user/integration.md)
- [Design](design.md)
- [Keys and addresses](design/keys.md)
- [Actions](design/actions.md)
- [Commitments](design/commitments.md)
- [Commitment tree](design/commitment-tree.md)
- [Nullifiers](design/nullifiers.md)
- [Signatures](design/signatures.md)
- [Circuit](design/circuit.md)
- [Gadgets](design/circuit/gadgets.md)
- [CommitIvk](design/circuit/commit-ivk.md)
- [NoteCommit](design/circuit/note-commit.md)