"Understanding Computers: Today and Tomorrow" is a comprehensive textbook by Charles Parker and Deborah Morley, published by Cengage Learning in 2016. This revised, 16th edition book covers various aspects of computer science and general computing in a trade paperback format. With 648 pages, this textbook is perfect for students and educators looking to deepen their understanding of the modern computer landscape. Its detailed content and informative approach make it a valuable resource for those interested in the world of computers.