Computer architecture is an important aspect of computer engineering. It refers to a set of rules and methods that reflects the functioning, organization and use of computer systems. The objective of computer architecture is to design a computer with optimum performance, power efficiency, low cost and maximum reliability. The primary subcategories of computer architecture are instruction set architecture, microarchitecture and system design. Some other types are macroarchitecture, pin architecture, programmer visible macroarchitecture, etc. This book elucidates the concepts and innovative models around prospective developments with respect to computer architecture. It picks up individual categories of computer architecture and explains their need and contribution in the modern scenario. This book is an essential guide for both academicians and those who wish to pursue this discipline further.