Look up more than 100,000 definitions from your Mac desktop. See full color illustrations and hear recorded pronunciations too. Look up more than 500,000 synonyms in the thesaurus. Make your current word processing program an expert on medical, legal, scientific and technical spelling. Available for MAC OS X in both individual and multi-user versions. Ideal for students, educators, writers, and word processing professionals. Also available for Microsoft Windows including Vista. Discounts are available for multi-user licensees and resellers.