Preface to the Second edition This second edition has been enlarged by the addition of sev- eral new topics while preserving its convenient pocket size. New in this edition are the following topics: Z-transforms, orthogonal polynomials, Bessel functions, probability an a summary of the most common probability distributions(binomial, Poisson, normal, t, Chi square, and F), the error function, and several topics in multivariable calculus that include surface area and volume, the ideal gas laws, and a table of centroids of common plane shapes. A list of physical constants has also been added to this edition. I am grateful for many valuable suggestions from users of the first edition, especially Lt. Col. W.E. Skeith and his olleagues at the U.S. Air Force Academy R.. T Philadelphia, 1992Preface to the Second Edition This second edition has been enlarged by the addition of sev￾eral new topics while preserving its convenient pocket size. New in this edition are the following topics: z-transforms, orthogonal polynomials, Bessel functions, probability and Bayes’ rule, a summary of the most common probability distributions (­binomial, Poisson, normal, t, Chi square, and F), the error function, and several topics in multivariable calculus that include surface area and volume, the ideal gas laws, and a table of centroids of common plane shapes. A list of physical constants has also been added to this edition. I am grateful for many valuable suggestions from users of the first edition, especially Lt. Col. W. E. Skeith and his colleagues at the U.S. Air Force Academy. R. J. T. Philadelphia, 1992