Though computer word is very common these days in India and almost this gadget is holding good position every house may be poor or rich. Students are very much dependent upon this machine being this is a subject in school education. Teachers often advise students to get assignment done on computer but yet not in every school. Most of the schools are going with smart education where e-books are used. Computer may be common in India yet unable to develop a taste of doing with the system. Every user is dependent on technicians to get their system operation. Some times operating system sets down and other times hardware lost its function. To get a new computer is not a problem but to maintain is the a cause of concern. We being playing with computer since 1987, understand the full operation and understand the functional language. To make aware of the parts, assembly section and some what repair of the gadget at home as how to do it. Some of the components not used these days are not included in this book like floppy drive, floppy disks etc. One should know the computer one is going to buy for use at home, office.