Apollo 10 "Guidance and Navigation Summary" manual by Delco Electronics, used by MIT engineer George Silver, 5.5 x 8.5, annotated on the top textblock edge, "Silver," with a label on the spine, annotated, "Apollo 10 Info." The manual has sections on "CM Software," "LM Software," "ASPO 45 CRT Displays," "Launch and Burn Schedule," "Burn Perturbations," "Entry," "Optics," "PIPA," "Coarse Align-Fine Align," "Digital Autopilot," and "Miscellaneous." It contains numerous diagrams, instructions, lists, and code definitions related to the guidance and navigation systems used on the Apollo 10 lunar orbital mission. There are several annotations inside made during the mission. In fine condition, with light wear from use. Silver was stationed at Cape Canaveral where he prepared the spacecraft guidance systems for flight. From the Don Eyles Apollo Computer Collection.