The 20-volume Oxford English Dictionary is the accepted authority on the evolution of the English language over the last millennium. It traces the usage of words through 2.4 million quotations from a wide range of international English language sources. The OED has a unique historical focus. Accompanying each definition is a chronologically arranged group of quotations that trace the usage of words, and show the contexts in which they can be used. Other features distinguishing the entries in the Dictionary are authoritative definitions; detailed information on pronunciation using the International Phonetic Alphabet; listings of variant spellings used throughout each word's history; extensive treatment of etymology; and details of area of usage and of any regional characteristics. This special offer combines the magnificent 20-volume second edition (published in 1989) with the portability and powerful search capabilities of the OED on CD-ROM v4.0, which is now Mac compatible.