McGraw-Hill authors represent the leading experts in their fields and are dedicated to improving the lives, careers, and interests of readers worldwide Clyde F. Coombs, Jr, (Los Altos, CA) recently retired from Hewlett-Packard. He is the editor of all five editions of the Printed Circuits Handbook, the first of which was published in 1967. He is also the editor of two editions of the Electronics Instrument Handbook and the communications Network Test and Measurement Handbook. McGraw-Hill authors represent the leading experts in their fields and are dedicated to improving the lives, careers, and interests of readers worldwide