Digital Electronics teaches the basic concepts of digital design in a clear, accessible manner. The book is designed to cover the syllabi of a full-semester course on digital electronics as part of undergraduate engineering programs in Electronics, Electronics and Communication, and Computer Science and Engineering. The coverage is extensive as well as intensive so that it serves the purpose of a wider spectrum of interested readers. In many cases, the design sequences are illustrated step-by-step for better comprehension. Special pedagogical features such as Reader Remember (RR), Confusion Clearing Corner (CCC), and Time to Take a Test (TTTT) are expected to help readers in various ways.