This document defines and provides brief descriptions of common digital technologies and online platforms: Email allows digital messages to be exchanged between users. Wikis enable collaborative websites and knowledge sharing. Social bookmarking facilitates adding, annotating, and sharing bookmarks online. HTML is the primary language for web pages. Podcasts are downloadable audio or video files. VoIP converts analog signals to digital for internet phone calls. Online chat provides real-time text messaging. The World Wide Web consists of hyperlinked documents on the internet. Streaming delivers multimedia continuously as it is received. Blogs are websites of discrete posts in reverse chronological order. URLs specify locations of websites and files. Web feeds syndicate frequently updated content for users to subscribe to.