Wikis are web-based applications that allow all users to not only view pages but also edit them. Inspired by the internet encyclopedia Wikipedia, more and more private users, small organizations, and even companies are discovering the diverse applications of wikis. With their simple structure and user-friendly operation, they present a serious alternative to expensive content management systems and form the foundation for a multitude of applications in the field of collaborative work. The book describes the practical use of wikis for project execution, both for users and operators. This includes a step-by-step introduction to the philosophy and functionality, an overview of controls and components, as well as the installation and configuration of the wiki clones MediaWiki, TWiki, and Confluence Wiki.