User groups Joomla uses groups as a method of assigning permissions. Default groups: Public, Guest, Manager, Administrator, Registered, Author, Editor, Publisher, Publisher, Super Users. However, you can create unlimited user-defined Groups.
View (MVC) One of the elements of the model-view-controller design pattern used for Joomla core components. The view is responsible for generating output sent to the browser by the component. The base API class we use for views is called JView.
Wrapper A Joomla module that allows you to “wrap” directly other Web sites for display on your Joomla site at a specific location as determined by the Module Position and the Pages Items section. The web page is inserted as an Inline Frame (also called an Iframe) into the web site layout template.