Oxford English Dictionary 4.0

The Oxford English Dictionary is the internationally recognized authority on the English Language, defining more than 500,000 words and tracing their usage through 2.5 million quotations from a wide range of literary and other sources. The text on the CD-ROM comprises the full text of the OED 2nd Edition, plus the three Additions volumes, as well as 7,000 new entries from the OED's continuing research.