This textbook was designed for a first course in differential and integral calculus, and is directed toward students in engineering, the sciences, mathematics, and computer science. Its major goal is to bring students to a level of technical competence and intuitive understanding of calculus that is adequate for applying the subject to real world problems. The text contains major sections on: (1) linear functions and derivatives; (2) computing derivatives; (3) applications of derivatives; (4) integrals; and (5) infinite series. The activities contained within these chapters are designed so that students can first study the exercise set and the solutions. Next, the students are asked to make modifications to the original problem, solve it, and move on to the variations. The appendices include math tables, additional reading and exercises, solutions, and hints to the exercises. (TW)