After the successful third edition, its a great pleasure for us to bring out the fourth edition of the book. So many specialists in their respective fields have contributed to the fourth and entirely rewritten edition of the Electrical Engineers’ Handbook. This reflects the increased importance which several subjects have assumed. Notable among these, on the theoretical side, are circuit stability and symmetrical components, and, among items of equipment, electronics rectifiers, aircrafts, aircraft equipments, plastic insulating materials, and induction and dielectric heating apparatus. This plan met with such enthusiastic response that it has been continued in this edition. The growth of knowledge and the greater degree of specialization in the various phases of electrical engineering have necessitated a considerable enlargement in this book. Careful selection and compression have been exercised in an effort to keep the book compact and readable. The bibliographies have been prepared with the idea of assisting the reader to further study of each subject, and they reflect each author’s idea of this plan. This edition covered all branches of engineering as well as a large amount of material dealing with allied fields of interest to electrical engineers. This book can be a complete solution for the students as it  serves as a quick reference guide and helps you to study the entire material in a limited time.