Unique passkey allows user to download the full dictionary & a complete thesaurus with more than 260,000 synonyms. Fully loadable for Windows ® or Mac ®. 7,500 new words & updated definitions in all subject areas. Has 2,500 new images. Features new computer & Internet terms, plus newly coined words in science, politics, business & the arts. Thumb indexed. 7 x 9 1/2. Reference Book Type: Dictionary; Thesaurus; Subjects: n/a; Age Recommendation: n/a; Language(s): English.