Wikimedia/What is Wikimedia?
Wikimedia is a not-for-profit organisation that owns some of the largest wikis on the internet, the most famous of which is Wikipedia. Wikimedia's goal is to deliver free information to every single person in the world. There are 16 wikis maintained by Wikimedia, each covering numerous languages, either via multi-lingual applications (Meta, Wikimedia Commons, Wikidata), or separate webservers (Wikipedia, Wikibooks, Wiki source, Wikiversity, Wiktionary). This book is about the foundation as a whole, and the wikis it maintains.
Wikimedia is also used a general term to either refer to specific technical platforms, applications, user projects, (yearly) campaigns or conferences, national chapters, or user groups.
The general software is called MediaWiki.