The first edition of Digital Computer Organization basically meant for student's studying in different colleges and universities across the globe. This book is specifically designed for IT and computer science students who want to relate things and understand the interdisciplinary and interrelated aspect of a processor and a computer processor.The course aims to facilitate clear conceptual understanding and to provide adequate practical experience of working with various information technologies and computer science components and devices available.The contents of the book have been divided into unit - 1, unit - 2, unit - 3, unit - 4 and unit-5 which confirms fully to the stipulations of the college/universities syllabi and the book also incorporates the exam pattern and methodology used by the colleges and Universities .