S.A. and may even see service in American cryptography, but security prevents the inventor from ever knowing of this—and may enable the agency or its employees to utilize his ideas without compensation. Fear of this may keep some inventors from submitting potentially valuable ideas. The agency might attract more suggestions by a firm promise not to use ideas without payment; this might be of some value if the matter ever came to court. But the agency will not give such a promise. More incomprehensibly, it will not even say why it will not. It seems that here N.S.A. is being deliberately self-injurious. COMSEC presides over a great variety of cryptosystems. The Army requires different methods for the differing needs of front-line, middle- echelon, and high-command communications. The Navy's needs may not vary quite so widely, but even it uses strip cipher for less important communications and rotor machines for more important ones. The Air
He hired PhDs in statistics to help him acquire undervalued players based on neglected numbers, like ground-outs for pitchers. Even if you hate baseball, you will love this book. End of Chapter Notes 3. Slugging percentage (SLG) = (1B) + (2B × 2) + (3B × 3) + (HR × 4)/AB. Walks are excluded from this calculation and were long undervalued in baseball, something Billy Beane and the Oakland Athletics capitalized on to create an incomprehensibly successful team on almost no budget, as described in Moneyball. 4. I'm indebted to Professor Robert Adair, Sterling Professor Emeritus of physics at Yale University and author of the classic The Physics of Baseball, for this help with these numbers. His commentary: "The distances vary with the air temperature, wind velocity, and backspin of the ball. Also, we don't have perfect values for the air resistance, which varies a little with the ball axis of rotation...
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