Yes, these are compilations. I have collected these articles from the web. The purpose of such compilations is to keep a copy of articles that I find interesting in one place (i.e. my website) so that it is easy to share them with friends. I donot wish to exercise and claim over them; that’s why I have clearly mentioned the source of the articles in the form of a highly visible link. Some people suggested, it would have been better if I had kept a record of such articles in the form of links only. May be they were right, but I have decided to keep a cop, just like anyone would keep a copy of a good book written long ago by master of letters.