In today’s digital world, no one can deny the importance of Computer. We can see that Computers have taken industries, businesses, and whole lifestyle to a new level. That’s why different organizations are including this section in competitive exams to check the basic understanding of computer terminologies and concepts of the candidates. According to the recent analysis of competitive exams, Computer Knowledge section is easiest to solve and most scoring section in exams, but this section is mostly neglected by many candidates. It is less time consuming and one can solve this section with accuracy. So understanding the importance of this section we are providing Study Notes of Computer. These Study Notes will be Exam-Oriented, precise and prepared by subject-expert.