In most of the systems, synchronous sequential circuits are used. The design of synchronous circuits is easy because they rarely have instability problems and their timing is easily broken down into independent discrete steps, each of which can be considered separately. This book begins with the description of different logic circuits. Different types of clocked storage elements are reviewed in this book. Analysis of synchronous sequential circuits with different types of flip-flops is explained in this book. Designing of synchronous sequential circuits with different types of flip-flops is also explained with examples.