> For the complete documentation index, see [llms.txt](https://book.r4re.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://book.r4re.io/fundamentals.md).

# FUNDAMENTALS

- [Roadmap](https://book.r4re.io/fundamentals/roadmap.md): Fundamentals Page