This book is the result of the enthusiasm of several people who saw the need for the telling of this story. It never would have come about without their cooperation and assistance.
First and foremost, I am indebted to Nancy Miller for the idea, and to Carol Mann for bringing it to me. Jackie Johnson was a patient soul and thoughtful editor who improved the manuscript. George Gibson was the guiding light.
Jean Bartik was a fountain of information and a burst of energy who spurred me on several times during research and writing. She tracked down ENIAC veterans across the country and pulled together many loose ends. Kathleen Mauchly Antonelli and Judy Eckert both were wonderful sources and devoted keepers of the flame who opened their homes, attics, basements, and memories to me. Herman Goldstine, too, was a patient participant who has an insightful sense of history.