Marching Orders: The Untold Story of How the American Breaking of the Japanese Secret Codes Led to the Defeat of Nazi Germany and Japan

by Bruce Lee

The note says: “The word ‘Magic’ is now fairly widely used to designate intelligence obtained from radio intercept sources. It does not provide more security than other descriptive words such as ‘intercept,’ ‘cryptanalysis’ and ‘code.’ Accordingly, it is requested that all persons concerned be instructed to refrain from using the word ‘Magic’ in telephone conversations or other conversations or communications in which such other descriptive words would not be used.”