> For the complete documentation index, see [llms.txt](https://books.letsdote.ch/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://books.letsdote.ch/application-domains/intro.md).

# Intro

<figure><img src="https://2923962641-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FaA2BvAuPbedKdA4xQ96n%2Fuploads%2FhXJnCOIzP5DwRSTqbBua%2FApplication%20Domains.drawio.png?alt=media&amp;token=0bbde571-1612-4790-b165-4cab76a2515c" alt=""><figcaption><p>Sub categories</p></figcaption></figure>