The document discusses various digital technologies and online communication methods including email, wikis, social bookmarking, HTML, podcasts, VoIP, online chat, streaming media, blogs, and URLs. Email allows electronic messaging without paper. Wikis enable collaborative editing online. Social bookmarking shares bookmarks. HTML codes web pages. Podcasts are episodic audio/video files downloaded online. VoIP uses the internet for phone calls. Online chat provides informal online communication. Streaming media is multimedia delivered and presented to users online. Blogs are websites with discrete posts displayed in reverse chronological order. URLs locate specific online resources.