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

# Nock

- [What is Nock?](https://docs.urbit.org/nock/what-is-nock.md): Introduction to Nock, Urbit's minimal assembly language and computation standard that underlies all of Urbit OS and Hoon compilation.
- [Decrement](https://docs.urbit.org/nock/decrement.md): Exercise in implementing decrement in Nock as a practice for understanding the language.
- [Definition](https://docs.urbit.org/nock/definition.md): Formal definition of Nock with reduction rules and combinator specifications.
- [Fast Hints and Jets](https://docs.urbit.org/nock/jetting.md): Runtime jetting system that accelerates Nock computation through fast hints. Cold state, hot state, warm state.
- [Implementations](https://docs.urbit.org/nock/implementations.md): Collection of Nock interpreter implementations in various programming languages.
- [Specification](https://docs.urbit.org/nock/specification.md): Complete Nock specification explaining the data model, reductions, and operational semantics.


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