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

# Deep dives

- [Concepts and terminology](https://docs.search.io/documentation/deep-dives/concepts-and-terminology.md): This page contains key terms used across our services and user documentation.
- [How Search.io works](https://docs.search.io/documentation/deep-dives/how-search.io-works.md)
- [Autocomplete](https://docs.search.io/documentation/deep-dives/autocomplete.md)
- [Spelling](https://docs.search.io/documentation/deep-dives/spelling.md)