---
title: "How to Spell TYPO3"
manual: "TYPO3 Community infrastructure"
version: "main"
permalink: "https://docs.typo3.org/permalink/guide-policy:spell-t3"
source: "Association/SpellingTypo3.rst"
rendered: "2026-09-25T10:02:45+00:00"
---

# How to Spell TYPO3 {#spell-t3}

## Uppercase, No Space {#spell-t3-rule}

TYPO3 is always written in uppercase, with no spaces. This rule covers all products under the TYPO3 project. URLs are the only exception to this rule.

A complete product name should have "TYPO3" as the first word, for example "TYPO3 CMS".

The number "3" is a part of the product name. It is not a version number.

Read about the history of the TYPO3 name.

## Dos and Don'ts {#spell-t3-dos-donts}

### The Right Way {#spell-t3-right-way}

-   "TYPO3 CMS"
-   "TYPO3 CMS 8 LTS"
-   "We use TYPO3 CMS for all our sites."
-   "We use TYPO3 for all our sites." (Informal only.)

### The Wrong Way {#spell-t3-wrong-way}

-   "Typo3 is great" (Correct: "TYPO3 is great")
-   "I use typo3" (Correct: "I use TYPO3")
-   "TYPO 3" (Correct: "TYPO3")
-   "Type03" (Correct "TYPO3")

## Exceptions for URLs {#spell-t3-url-exceptions}

### Always Lowercase {#spell-t3-always-lowercase}

-   "www.typo3.domain"
-   "typo3.domain"
-   "Visit typo3.domain"

### Never Mixed Case {#spell-t3-never-mixed-case}

-   "Go to this page at Typo3.domain" (Correct: "Go to this page at typo3.domain")
-   "TYPO3.domain" (Correct: "typo3.domain")
-   "www.Typo3.domain" (Correct: "www.typo3.domain")
-   "www.TYPO3.domain" (Correct: www.typo3.domain")
-   "WWW.TYPO3.DOMAIN" (Correct: www.typo3.domain")