This document defines common online terminologies used today. It explains what email, wikis, social bookmarking, HTML, podcasts, VoIP, online chat, the World Wide Web, streaming, blogs, social networking, URLs, web feeds are. Email allows digital messaging over computer networks. Wikis allow collaborative editing of content online. Social bookmarking services let users tag and share web documents. HTML enables embedding images and objects and creating forms on webpages. Podcasts are downloadable digital media files. VoIP technologies deliver voice and multimedia over the internet. Online chat provides real-time communication. The World Wide Web displays hyperlinked documents over the internet. Streaming delivers multimedia over time. Blogs are reverse chronological collections