The Encyclopedia Britannica Discovery Series Human Body & Planet Earth CD-ROMs are educational software designed for Windows and Mac operating systems. These CD-ROMs contain informative content about the human body and planet Earth, making them a valuable resource for students and educators. With a minimum of 128 MB RAM and 20 MB of hard drive space required, these CDs offer a comprehensive learning experience for those interested in science and exploration. The brand, Encyclopedia Britannica, ensures high quality and accuracy of the information presented in the software.