"Understanding Computers" 6 volume set by Time-Life: Robotics ISBN 0-8-4, Software ISBN 0-8-1, Input/Output ISBN 0-8-2, Computer Languages ISBN 0-8-X, Revolution in Science ISBN 0-8-5, Computer Images ISBN 0-8-1. 128 pp each. Hardbound, beautiful with many color photos. Very thorough, informative and enjoyable. Excellent condition. Will ship. Will separate. $3 each, $15 for all.