American Cryptology during the Cold War, 1945-1989: Book I: The Struggle for Centralization 1945-1960 [Part 1, excised] [open pdf - 8MB]
This section of Thomas Johnson's history of the National Security Agency (NSA) during the Cold War contains pages i-xvii and 1-155 of Book 1. This encompasses the first three chapters, titled 'Cryptologic Triumph and Reorganization, 1941-1949,' 'AFSA (Armed Forces Security Agency),' and 'Cryptology under New Management.' Throughout Book 1, Johnson "explains how cryptology responded to the landmark events and challenges of the post-World War II era. He next provides profound analysis of how events and personalities affected the development of cryptology institutionally and professionally. Finally, and even better, Dr. Johnson spins a fascinating tale of the success or failure of cryptologic operations in the various crises that have challenged the SIGINT system."
National Security Archive: http://www.gwu.edu/~nsarchiv/