The material in this book is aimed at refining computational
skills in advanced undergraduate or beginning graduate students
by providing direct experience in using a computer to model phy-
sical systems. Its scope includes the minimum set of numerical
techniques needed to "do physics" on a computer. Each of these is
developed in the text, often heuristically, and is then applied to
solve non-trivial problems in classical, quantum, and statistical
physics. These latter have been chosen to enrich or extend the
standard undergraduate phYSICS curriculum, and so have consid-
erable intrinsic interest, quite independent of the computational
principles they illustrate.