# WCAG 2.2 – 3.1.4 Abbreviations

- Level: AAA
- Principle: 3 Understandable
- Guideline: 3.1 Readable
- Introduced in: WCAG 2.0

## What the rule requires

Abbreviations are expanded or explained.

## How to get it right

Spell out the abbreviation at first use: “Web Content Accessibility Guidelines (WCAG)” – or use <abbr title="…">.

## Who benefits

- People with cognitive disabilities
- Blind people

## Sources

- [This rule on wcag.dehl.net](https://wcag.dehl.net/en/wcag/3-1-4/)
- [Official W3C explanation](https://www.w3.org/WAI/WCAG22/Understanding/abbreviations)
- [Techniques (WCAG Quick Reference)](https://www.w3.org/WAI/WCAG22/quickref/#abbreviations)

_Plain-language explanation. Only the original W3C text is normative._