Computer Architecture and Parallel Processing is more of an art than science. It covers computer system, microprocessors, circuits & system programs. High speed computing deals with designing very high performance computing systems architecture. Due to technological limits on the basic raw speeds of the circuits, computer architects employ various techniques to obtain the high performance. This volume deals with the architectural principles and theory in synchronous parallel systems employing temporal as well as spatial parallelism. It presents complete theoretical treatment of the topics of relevance in these architectures. This book is designed to cover the syllabus for undergraduate as well as postgraduate students of different Indian universities, who study computer organization as a part of their curriculum. This book gives the basic knowledge necessary to understand the operation of digital computer.