This post is the 5 th post in the "Web 2.0 for dummies" posts, based on my Web 2.0 presentation in a conference. After tasting Web 2.0 (part 2) and understanding what it is (part 4) we will drill down to more specific Web 2.0 principles and implementations. The origin of Mashups is in Music: Creating a new song by combining songs. In information technology Mashups are applications build by non-IT Professionals by combining together data or applications from different sources, which were not planned for integration together. The User assembles and links services to create an application The services could be data services or could include Business Logic functionality The user publishes the application in the Web so other users may use it or expand it as another Mashup . Technologies used for building a Mashup based on simple published API s include HTML , XML , simple Web Services and Representational State Transfer (REST). By using JavaScript or other scripting languag...