A technical pleasure and also very good glimpse into the Apollo team - working together, to land on the moon. It is a fun easy read, written by the fellow in charge of programming the guidance computer on the lunar lander. It is also a great snapshot of that time in history, the excitement of Apollo, and with the frustration of the Vietnam war going on, some protests, etc. Just a hint - the main programmer, was an English major, and his use of the right words, were a key factor in the success of of creating an efficient and effective computer language