I doubt that anyone visiting this page hasn't heard of Google, however, some of you may not be aware of Google Groups. From this site you can search a variety of Usenet newsgroups (a forum/BBS system that predates the web), as well as Google's own groups. This page can be exceptionally useful when you are searching for help and advice about computer problems - after you have checked for help on this page, of course. The chances are you are not the only one with a particular problem. Someone has probably asked for help with it before and maybe received an answer on Usenet.
Students should also be interested Google Scholar, which can be used to search for academic books and journal articles.