Just Alt-click on any word in any Windows application (e-mail, browser, Office, and so on), and GuruNet brings up a quick definition or explanation--instant answers from encyclopedias, biographies, celebrities, companies, news, sports, weather, stock prices, maps, military terms, idioms, tech terms, acronyms, and much more.

Unlike search engines that show you long lists of links to follow one-by-one, GuruNet brings a summary to you in a simple pop-up window, without interrupting your work.

Also included is our IE toolbar for Web-only version.