Digital electronics is the branch of physics that deals with electronic circuits that use digital signals. In digital circuits, signals can be transmitted without degradation. A digital circuit is constructed using logic gates that are created from electrically controlled switches such as transistors. An integrated circuit consists of multiple transistors on a single silicon chip, and designed using electronic design automation software. Digital circuit complexity can be minimized using algorithms such as Espresso heuristic logic minimizer. Algorithms for the optimization of large logic systems employ binary decision diagrams or algebraic manipulations. This book is a valuable compilation of topics, ranging from the basic to the most complex theories and principles in the field of digital electronics. The various aspects of digital electronics along with technological progress that have future implications have also been glanced at. In this book, constant effort has been made to make the understanding of the difficult concepts of digital electronics as easy and informative as possible, for the readers.