Summary: Our best-selling dictionary. With more than 200,000 clear definitions; over 20,000 new words; more than 2,500 illustrations; a style manual; 400 usage notes; regionalisms; an Appendix of Indo-European Roots; and biographical and geographic entries. The CD-ROM includes over 350,000 entries on a single disk. Recorded human voices pronounce each entry. System Requirements: CD-ROM drive with 8-bit sound card (MPC compliant); Windows: 3.1 or higher, 386/25 with 4 MB RAM, ...show more2 MB hard-disk space; Mac: System 6.0.2 or higher, 1 MB RAM (2MB System 7), 500K hard-disk space.