Whether you use your computer for work or fun, the programs you use generally have one thing in common - they are stored on your PC. Increasingly though, that software is moving online. Google has made a variety of programs available online. The move to put more and more of those familiar programs on to the web has been happening for a while but its latest incarnation has won the name of Web 2.0. What is it - the definition is imprecise at best, but it loosely describes a category of websites that are known for interactivity, collaboration and community.

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