The present edition of the ?Handbook? series has been designed to work as a quick revision aid for the students. It is a compact, portable, revision book suitable for problem solving and exam revision. Containing almost all useful formulae, equations, key notes, and definitions, this handbook has been specifically designed for the students to score higher marks in GATE, IES & PSUs. The book is also formulated with theoretical concepts related to Computer Science & IT, supported with formulae and circuit diagrams for better understanding. Covering almost 100% of the prescribed syllabus, it is the only book for multi-purpose quick revision and ensures success in IES, GATE, PSUs and other competitive examinations. This book inculcates: 1. Complete coverage of syllabus 2. Key notes, Formulae, Definitions and Terms 3. Theoretical concepts on the lines of examination pattern 4. Circuit diagrams to support the formulas 5. Highly useful for GATE, IES, PSUs and other competitive exams 6. Only book for Multi-purpose quick revision Table of Contents Theory of Computation, Data Structure with Programming in C, Design and Analysis of Algorithms, Database, Management Systems, Operating System, Computer Network, Compiler Design, Software Engineering and Information System, Web Technology, Switching Theory and Computer Architecture, Appendix.