Salas and Hille is a classic Wiley offering considered to be one of the most outstanding calculus textbooks. It has a terse and elegant mathematics presentation which appeals to those who are interested in leanness in exposition. The focus is on three basic concepts--limit, derivative and integral. Student--friendly, the book's mathematical statements are careful and precise and all important theorems are proved. This expanded edition incorporates modern technology and current trends without sacrificing its acknowledged strengths.