The Visual Thesaurus, by Thinkmap Inc., maps relationships among words in three dimensions, rotating to reveal the entire universe of related words. It's like the class know-it-all, but more fun: Placing the cursor over a word (colored by part of speech) reveals its meaning; placing it between words shows how they are related. Clicking on a meaning reorders the universe with the new word at the center. Online subscriptions are $11.95 a year (www.visualthesaurus.com).
A version of this article appeared in the August 2004 issue of Fast Company magazine.
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