index.md

---
title: UI
slug: Glossary/UI
page-type: glossary-definition
---

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**User Interface** (UI) is anything that facilitates the interaction between a user and a machine. In the world of computers, it can be anything from a keyboard, a joystick, a screen or a program. In case of computer software, it can be a command-line prompt, a webpage, a user input form, or the front-end of any application.

## See also

-[User interface](https://en.wikipedia.org/wiki/User_interface) on Wikipedia
-[Front end development](https://en.wikipedia.org/wiki/Front_end_development) on Wikipedia