The invention of the thesaurus is definitely high on the list of best ideas known to man. Students struggling to sound intellectual in their essays, lawyers who need large and difficult words, and commuters who love to do the daily crossword puzzle can all concur wholeheartedly. A good thesaurus is a necessity in all homes, schools, universities, and businesses around the globe. These days, there are many different kinds of thesauri for different markets. Check out the Oxford Primary Thesaurus for little kids, The Highly Selective Thesaurus for the Extraordinarily - Eugene Ehrlich for university students who want a highly articulate essay, and the Collins Pocket Thesaurus for when you're on the go.