The document discusses different types of notes and wikis, including self notes, expert notes, history notes, collaborative notes, personal wikis, book/manual wikis, domain-oriented wikis, usage-oriented wikis, and encyclopedic wikis. It also discusses Wikipedia stubs and how to write them, as well as why Wikipedia works and why a Taiwanese version has not been as successful. Google trends from 2005-2006 are analyzed which show the rise of social media and Wikipedia.