Now a days one hardly finds a book on analog computer or computation. This is a book on techniques of using a analog computer for solving differential equations and in simulating dynamic systems. It presents analog computers to those with little background in electronics. The presentation is elementary and a knowledge of ordinary differential equations and a high school physics are the only requirements to understand most of the book.The numerous examples in the text illustrate scaling of analog computers for solving both linear and non-linear problems. Systematic methods of checking analog computer solutions, and iterative analog computation are also outlined.The subject matter of the text is useful in courses relating to continuous systems simulation; as an adjunct text for signal systems, control systems, chemical process control, mechanical vibrations and dynamics, this book is very beneficial.