As the Web continues to evolve, advances in Web technology forge many new applications that were not previously feasible, resulting in new usage paradigms in business, social interaction, governance, and education. The Handbook of Research on Web 2.0, 3.0, and X.0: Technologies, Business, and Social Applications is a comprehensive reference source on next-generation Web technologies and their applications. This in-depth two volume collection covers the latest aspects and applications of Web technologies including the introduction of virtual reality commerce systems, the importance of social bookmarking, cross-language data retrieval, image searching, cutting-edge Web security technologies, and innovative healthcare and finance applications on the Web. Examining the social, cultural, and ethical issues these applications present, this Handbook of Research discusses real-world examples and case studies valuable to academicians, researchers, and practitioners.