dear colleagues : if u want to know detail and good concept of "What is Web 2.0?",visit the URL give below in which Tim O'Reilly outlines his definition of Web 2.0, which is one of the more detailed and considered definitions available. http://www.oreilly.com/pub/a/oreilly/tim/news/2005/09/30/what-is-web-20.html Shri Ram Pandey Information and Knowledge Management Trainee NCSI,Indian Institute Of Science,Bangalore -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.