A practical, easily accessible guide for bench-top chemists, this book focuses on accurately applying computational chemistry techniques to everyday chemistry problems. * Provides nonmathematical explanations of advanced topics in computational chemistry. * Focuses on when and how to apply different computational techniques. * Addresses computational chemistry connections to biochemical systems and polymers. * Provides a prioritized list of methods for attacking difficult computational chemistry problems, and compares advantages and disadvantages of various approximation techniques. * Describes how the choice of methods of software affects requirements for computer memory and processing time.