The 20th Century Day by Day Millennium Edition PC CD-Rom is a comprehensive reference tool that provides a detailed look at the events, people, and milestones of the 20th century. Produced by DK, this science-based software offers a lifetime licence and is designed for use with Microsoft Windows 98 and Windows 95 operating systems. With its English language interface and CD format, this product is a valuable resource for education, language, and reference purposes, making it an essential addition to any computer library.