<P> It's a story about community and collaboration on a scale never seen before . It's about the cosmic compendium of knowledge Wikipedia and the million - channel people's network YouTube and the online metropolis MySpace . It's about the many wresting power from the few and helping one another for nothing and how that will not only change the world but also change the way the world changes . </P> <P> Instead of merely reading a Web 2.0 site, a user is invited to contribute to the site's content by commenting on published articles or creating a user account or profile on the site, which may enable increased participation . By increasing emphasis on these already - extant capabilities, they encourage the user to rely more on their browser for user interface, application software ("apps") and file storage facilities . This has been called "network as platform" computing . Major features of Web 2.0 include social networking websites, self - publishing platforms (e.g., WordPress' easy - to - use blog and website creation tools), "tagging" (which enables users to label websites, videos or photos in some fashion), "like" buttons (which enable a user to indicate that they are pleased by online content), and social bookmarking . Users can provide the data that is on a Web 2.0 site and exercise some control over that data . These sites may have an "architecture of participation" that encourages users to add value to the application as they use it . Users can add value in many ways, such as by commenting on a news story on a news website, by uploading a relevant photo on a travel website, or by adding a link to a video or TED talk which is pertinent to the subject being discussed on a website . Some scholars argue that cloud computing is an example of Web 2.0 because cloud computing is simply an implication of computing on the Internet . </P> <P> Web 2.0 offers almost all users the same freedom to contribute . While this opens the possibility for serious debate and collaboration, it also increases the incidence of "spamming", "trolling", and can even create a venue for racist hate speech, cyberbullying and defamation . The impossibility of excluding group members who do not contribute to the provision of goods (i.e., to the creation of a user - generated website) from sharing the benefits (of using the website) gives rise to the possibility that serious members will prefer to withhold their contribution of effort and "free ride" on the contributions of others . This requires what is sometimes called radical trust by the management of the Web site . According to Best, the characteristics of Web 2.0 are: rich user experience, user participation, dynamic content, metadata, Web standards, and scalability . Further characteristics, such as openness, freedom and collective intelligence by way of user participation, can also be viewed as essential attributes of Web 2.0 . Some websites require users to contribute user - generated content to have access to the website, to discourage "free riding". </P> <P> The key features of Web 2.0 include: </P>

Which of the following is not an example of a web 2.0 tool