American Heritage College Dictionary, 4th edition, includes a registration card with pass key that allows you to download a full dictionary and a complete thesaurus with more than 260,000 synonyms (Windows and Mac compatible). The hardbound book offers 7,500 new words and updated definitions in all subject areas, totally new illustration program with 2,500 new images, new computer/Internet terms and newly coined words in science, politics, business and the arts. Dictionary provides more in-depth features, more example sentences, up-to-date biographical and geographical entries, and expert usage guidance from the American Heritage Usage Panel. Dictionary contains 1,664 pages.