Overview In preparing the eleventh edition of Thomas? Calculus, we have worked to capture the style and strengths of earlier editions. Our goal has been to revisit the best features of the Thomas? Calculus classic editions while listeining carefully to the suggestions of our many users and reviewrs. With these high standards in mind, we have reconstructued the exercises and clarified some difficult topics. N the words of George Thomas, ?(We) have tried to write the book as clearly and precisely as is possible.? In addition, we have restructured the contents to be more logical and in alignment with the standard syllabus. In looking backward, we have learned much to help us create a useful and appealing calculus tex for the next generation of engineers and scientist.