If you're like most librarians, Google  has become one of your essential tools of the trade. And now Google has expanded its search capabilities to our desktops! Google Desktop Search  installs just about as quickly as the Google Toolbar  does (another tool I've found essential). You download the application, it indexes what's on your hard drive, in your e-mail, searches you've run, webpage history, instant messages, etc. It will detect files from Word, Excel, Powerpoint, Internet Explorer, Outlook & Outlook Express, AOL Instant Messenger, and any text files. And then, each time you re-start your computer, GDS will detect new files and index them automatically. Best of all, it's free!