# Accessibility concepts

> Learn the background concepts that underpin accessible development, including disability categories, assistive technologies, and how screen readers work.

Learn the background concepts that underpin accessible development, including disability categories, assistive technologies, and how screen readers work.

| **Topic**                                                                                  | **Description**                                                                                                                                                     |
| ------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [Accessibility fundamentals](/engine/6000.5/manual/accessibility/concepts/fundamentals.md) | Understand disability categories, assistive technologies, universal design principles, and the human, legal, and business case for building accessible experiences. |
| [Screen readers](/engine/6000.5/manual/accessibility/concepts/screen-readers-intro.md)     | Learn how screen readers work, what they need from your application, and best practices for supporting them.                                                        |

## Additional resources

* 📺 **Video**: [Reach new audiences with Accessibility and Localization in Unity 6 (Unite 2025)](https://youtu.be/Ezz7R--kf6c?si=gnPx8uJTcgCF02an)
* ⚙️ **Sample project**: [LetterSpell: example of an accessible Unity application](https://github.com/Unity-Technologies/a11y-public-sample)
* 👥 **Community**: [Unity Discussions: Accessibility](https://discussions.unity.com/tag/Accessibility-Features)