Computer Fundamental is a backbone of the Computer Science, Computer Applications and Information Technology. It provides the knowledge about types of computers and various parts of it. Computer hardware and software are discussed details in this book. The digital devices of computer machine are also included for covering the whole syllabus of “Introductory Electronics”. As per the revised and centralized syllabus, topics related to Office automation are covered. The whole knowledge about MS-Word, MS-Excel and MSPowerPoint are motioned. In the chapter 12, Internet Technology topics are discussed in detail. This Book is suitable for both students and teachers. The study and teaching materials of this book is largely derived from the lectures. I delivered to the participants of the BCA, BBA, DCA, B. Com. B. Lib. B. Sc., B. Tech., Polytechnic, MA, M. Com. and M. Sc. I would like to record my thanks to all students and my friends. My special thanks go to Dr. A. K. Saxena and Dr. A. K. Mishra (Prof. Guru GGU Central University, Bilaspur, C.G.), Dr. O. P. Vyas (Prof., IIIT, Raipur, C.G.), Dr. Mithilesh Atulkar (Associate Prof., NIT, Raipur), Dr. Sanjay Kumar (Prof. in Comp. Sc., Pt. RSU, Raipur (C.G.)), Dr. H. S. Hota (Associate Prof. in Comp. Sc. ABB University, Bilaspur), Dr. V. K. Patle (Asstt. Prof. in Comp. Sc., PRSU, Raipur), Prof. H. S. Tondey (Sarguja University, Ambikapur, C. G.), Dr. S. M. Ghosh (Arvindo University, Pondicherry), Dr. P. K. Gupta (IKS University, Khairagarh), Dr. A. K. Mishra, Dr. Sanjeev Karmakar, Dr. Rohit Miri, Dr. Neelam Sahu, Dr. S. R. Tandan, r. Amit Tamrakar, Dr. Ashish Bhoi, Dr. J. D. P. Rao, Dr. Sanat Sahu, Dr. Mamta Singh, Shri R. Hatwar (Soft. Engg.), Prof. Raju Khunttey, Prof. Durgesh Kotagle, Prof. Sushil Sahu Dr. Devendra Chaphekar, Dr. Anil Sharma and Dr. Suja Varghese. My sincere thanks go to OSD CG State Higher Education (Prof. Dr. G. A. Ghanshyam), Vicechancellor Dr. Aruna Palta, Registrar, Chairman, Administrator, Principal, IQAC Coordinator and NACC Coordinator. Finally, my special thanks to my parents, my daughter Lipsa Miri and my son Nikhil Miri and support throughout this book.