This book is intended to serve as a textbook for everyone interested in Computers and Information Technology. It covers all the topics relating to Computers and Information Technology by addressing the requirements of postgraduate level study of the subject. This book does not expect the reader to have any previous knowledge of computers or information technology. It introduces the concepts from the very beginning and unfolds the topics in logical and comprehensive way.

In this revised edition of the book, the chapters have been revamped to accommodate the recent technological progress. Instead of seven chapters in the previous edition, this edition is organized in Eleven chapters.

Chapter -1 is entitled Introduction to Computers and Information Technology. Chapter 2 is entitled A Close Look at the computer. Chapter 3 deals with Representation of Data. Chapter 4 is entitled Microprocessor and Systems. Chapter 5 deals with Peripheral Devices. Chapter 6 is entitled Software Concepts. Chapter 7 explains Programming Concepts and Chapter 8 is devoted to Operating Systems. Chapter 9 is entitled Data Processing. Chapter 10 deals with Data Communications and Computer Networking. Chapter 11 is entitled Internet and E-Commerce.

Some of the new topics introduced in this edition

Browser, Computer Virus and Vaccines, Desktop Publishing, Digital Camera, Digital Video Disk, E- Cominerce, Education and Entertainment, Impact of Information Technology on society and business. Impact of Internet, Information Technology Definition, Linux Operating System, M-Commerce, MICR, Non program Software, Object Oriented Database Management System (ODBMS), Open Systems Interconnection (OSI), Optical Disk, RAID, Security Systems, System Configurations, Web Sites, ZIP Drive and recent technological advances have been addressed in this edition.

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