Software comprises the set of instructions guiding a computer's operations. Software engineering is a branch of computer science that focuses on systematically applying engineering principles to develop a software. This discipline entails designing and implementing intricate computer programs and their maintenance. Software engineering is a broad field that comprises various sub-disciplines. Some of the notable sub-disciplines are software development, software design, and software testing. This book is compiled in such a manner, that it will provide in-depth knowledge about the theory and practice of software engineering. The various subfields within this area of study along with the technological progress that have future implications are glanced at in this text. It will serve as a valuable source of reference for graduate and postgraduate students.