> For the complete documentation index, see [llms.txt](https://strv.gitbook.io/frontend/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://strv.gitbook.io/frontend/project-guidelines/quality-output/accessibility/fundamentals.md).

# Fundamentals

* The official WCAG 2.0 levels vs. unofficial naming
* Visual impairment
* Hearing impairment
* Movement impairment
* Speech impairment
* Other impairments