Too often, the word you need on the page is not the word you entered on the screen. An onscreen thesaurus helps you scan through possible synonyms and automatically replaces the old word with the better word. Quality in an onscreen thesaurus depends on the number of synonyms available; this one puts the equivalent of a page or two of Roget’s on your screen for every word you look up. I actually stopped using one word processor —Framework II — because I couldn’t get Webster’s Thesaurus to work with it.