The 2012 World Book Encyclopedia on CDROM by Software Mackiev is a comprehensive reference tool for students, educators, and anyone interested in learning more about a variety of subjects. With detailed information presented in an easy-to-understand format, this encyclopedia is accessible on both Mac and PC platforms. Whether you are looking to explore a new topic or simply want to supplement your knowledge, the 2012 World Book Encyclopedia offers a wealth of information at your fingertips.. See pictures for details. Item pictured is of actual item being sold.