+++ title = "Reference" weight = 3 sort_by = "weight" template = "sections/docs/chapters.html" +++ Various reference documents are stored here, particularly for Hoon, but also for other parts of the system. ## [The Arvo Glossary](@/docs/reference/arvo-glossary.md) Urbit is known for introducing a great deal of new terminology. The glossary will help demystify our jargon. ## [The Azimuth Glossary](@/docs/reference/azimuth-glossary.md) Azimuth, the Urbit identity layer, has its own vocabulary. ## [The Cheat Sheet](@/docs/reference/cheat-sheet.md) The cheat sheet is a compact document for looking up Hoon runes. ## [Hoon Expressions](@/docs/reference/hoon-expressions/_index.md) This section contains more comprehensive reference materials for Hoon runes and other expressions, describing their exact semantics and syntax. ## [Standard Library](@/docs/reference/library/_index.md) This section documents the gates and mold-builders of the Hoon standard library. ## [Troubleshooting](@/docs/reference/troubleshooting.md) When your Hoon produces an error, check what it means here.