This document defines and describes common online terminology: - Email allows digital messaging over the internet or networks, containing text, images, and files. The first email was sent in 1971. - Wikis are open-editing online databases that allow anyone to add and update information. The first wiki was created in 1995. - Social bookmarking allows users to bookmark, annotate, edit, and share web pages from different computers or to organize large numbers of bookmarks. - Other terms defined include HTML, podcasts, VoIP, online chat, the World Wide Web, streaming media, blogs, social networking, URLs, and web feeds.