11 Std Csc
Computer Science
PLUS I
Volume 1 : Concepts Government of Tamilnadu
© Government of Tamilnadu First Edition – 2005 Chairman Syllabus Committee Dr. Balagurusamy E, Vice Chancellor, Anna University, Chennai Co-Ordinator Textbook Writing Dr. Sankaranarayanan V, Director, Tamil Virtual University, Chennai Authors Dr. Elango S, Government Arts College, Nandanam, Chennai Dr. Jothi A, Former Professor, Presidency College, Chennai Mr. Malaiarasu P , Government Arts College, Nandanam, Chennai Dr. Ramachandran V, Anna University, Chennai Dr. Rhymend Uthariaraj V, Anna University, Chennai Reviewers Dr. Gopal T V, Anna University, Chennai Dr. Krishnamoorthy V, Crescent Engineering College, Chennai Copy-Editor Ms. Subha Ravi, Director, M/s Digiterati Consultancy Pvt. Ltd, Chennai Cover Design Mr. Madan, Free Lance Graphics Designer Price Rs. : This book has been prepared by the Directorate of School Education on behalf of the Government of Tamilnadu This book has been printed on 70 G.S.M. Paper
FOREWORD A computer allows users to store and process information quickly and automatically. A computer is a programmable machine. It allows the user to store all sorts of information and then ‘process’ that information, or data, or carry out actions with the information, such as calculating numbers or organizing words. These features of computer make it a valuable tool in the hands of users. Computers make life easy. Users can focus their attention on solving more complex problems leaving out the routine activities that can be computerized. The creative abilities of the users can thus be used more effectively. The users have to utilize this powerful tool for the benefit of individuals, organizations, nations and the world. Computers cannot do things on their own. The users must understand the ways in which problems can be solved with computers. This volume contains the basic concepts required for you to become a user of the computer. This volume 1 2. 3. 4. Introduces the key
PLUS I
Volume 1 : Concepts Government of Tamilnadu
© Government of Tamilnadu First Edition – 2005 Chairman Syllabus Committee Dr. Balagurusamy E, Vice Chancellor, Anna University, Chennai Co-Ordinator Textbook Writing Dr. Sankaranarayanan V, Director, Tamil Virtual University, Chennai Authors Dr. Elango S, Government Arts College, Nandanam, Chennai Dr. Jothi A, Former Professor, Presidency College, Chennai Mr. Malaiarasu P , Government Arts College, Nandanam, Chennai Dr. Ramachandran V, Anna University, Chennai Dr. Rhymend Uthariaraj V, Anna University, Chennai Reviewers Dr. Gopal T V, Anna University, Chennai Dr. Krishnamoorthy V, Crescent Engineering College, Chennai Copy-Editor Ms. Subha Ravi, Director, M/s Digiterati Consultancy Pvt. Ltd, Chennai Cover Design Mr. Madan, Free Lance Graphics Designer Price Rs. : This book has been prepared by the Directorate of School Education on behalf of the Government of Tamilnadu This book has been printed on 70 G.S.M. Paper
FOREWORD A computer allows users to store and process information quickly and automatically. A computer is a programmable machine. It allows the user to store all sorts of information and then ‘process’ that information, or data, or carry out actions with the information, such as calculating numbers or organizing words. These features of computer make it a valuable tool in the hands of users. Computers make life easy. Users can focus their attention on solving more complex problems leaving out the routine activities that can be computerized. The creative abilities of the users can thus be used more effectively. The users have to utilize this powerful tool for the benefit of individuals, organizations, nations and the world. Computers cannot do things on their own. The users must understand the ways in which problems can be solved with computers. This volume contains the basic concepts required for you to become a user of the computer. This volume 1 2. 3. 4. Introduces the key