With the advancement of technology, digital logic systems became inevitable and became the integral part of digital circuit design. Digital logic is concerned with the interconnection of digital components and modules, and is a term used to denote the design and analysis of digital systems. Recent technology advancements have led to enhanced usage of digital systems in all disciplines of engineering and have also created the need of in-depth knowledge about digital circuits among the students as well as the instructors. It has been felt that a single textbook dealing with the basic concepts of digital technology with design aspects and applications is the standard requirement. This book is designed to fulfill such a requirement by presenting the basic concepts used in the design and analysis of digital systems, and also providing various methods and techniques suitable for a variety of digital system design applications.