Military computing tends to be 800 pound gorilla in
the room that historians tend to dismiss.
How do you figure? The early history of digital computing, especially
in the 1940s - 1950s, is dominated by military installations. Colossus,
ENIAC, many UNIVACs, SEAC/SWAC, SAGE, etc. .... in fact this year's
winner of the Computer History Museum Prize* is "Calculating a Natural
World" by Atsushi Akera. The book is a great read and focuses on Cold
War computer research.
* The prize is administered by the Society for the History of
Technology's Special Interest Group for Computers, Information, and
Society, a.k.a. SHOT-SIGCIS. This is the primary organization for
professional computer historians.