This document discusses Library 2.0 and related concepts. It begins by defining Library 2.0 as applying Web 2.0 tools to library services to meet user needs caused by the effects of Web 2.0. Web 2.0 is described as facilitating user participation and collaboration. Key differences between Library 1.0 and Library 2.0 are outlined, with Library 2.0 being more user-centered, participatory, and flexible. Examples of Web 2.0 tools for libraries like wikis, blogs and RSS feeds are provided along with potential benefits and use cases.