> For the complete documentation index, see [llms.txt](https://note.levelcode.org/software-engineering-notes/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://note.levelcode.org/software-engineering-notes/readme/2-subdomain.md).

# Subdomain

A subdomain is a part of a bigger domain (business domain) which solves a specific part of it.