This 1999 Mosby's Medical Encyclopedia CD-ROM is a valuable addition to any collection. The Learning Company created this software for Windows 3.1, 95, and 98 operating systems. It comes in a big box and is still factory sealed. This CD-ROM contains encyclopedias and dictionaries in English, making it perfect for education, language, and reference purposes. The format is CD, and it falls under the category of software and computers/tablets & networking. Don't miss out on the chance to own this rare and useful item.