"A computer is an electronic device that inputs data and performs execution on it. Early computers were calculators with/without storage capability. The popular computers that were used in the early days are Abacus, Napier’s bones, Adding Machine, Jacquard’s Loom, Difference Engine, and Analytical Engine. The computer executes the instructions given by the user and produces the desired output. The four components of a computer system are an input device, a processing device, a storage device, an output device. Input devices provide ways to communicate with the computer. Processing devices store retrieve and process data. Storage devices are used to store information. Output devices receive or display output from a computer. Computers can be classified into various categories: supercomputer, mainframe computer, minicomputer, and microcomputer. Supercomputers are used for jobs that take massive amounts of calculating, like weather forecasting, engineering design. Mainframe computers are mainly used in banking and financial sectors etc. Minicomputers are mainly used in departmental systems, online reservations, etc. Microcomputers are mainly used in offices and as personal computers. Today Information Technology is a must as a subject as well as general life experience. While studying Information Technology as a subject in CBSE curriculum it is difficult for students to find a right helping tool or resource which can provide all the possible solution. Apart from course books by CBSE students also refer and practice NCERT stuff for the subject. NCERT Exercises are a very powerful study material to study and evaluate the understanding of the topic on a deeper level. NCERT Solutions are known as an extremely helpful resource for exam preparation. If you are looking for the best NCERT Information Technology solution online then Extramarks is the only trusted name. Extramarks provide the NCERT solutions for CBSE Class 9 Information Technology for all important modules and chapters The NCERT solutions for Class 9 Information Technology Convergence and Computing Technology includes expert content from the best teachers in the country. These NCERT resources are also a useful aid during preparations for various competitive exams. The NCERT Solutions for Class 9 provide solutions and answers to all the problems and questions discussed in the NCERT textbooks. Extramarks make available students with solutions and learning through Educational Technology backed courses for all classes and subjects. These online courses and exercises offer a thorough understanding of each concept and are enriched using animated images and videos. NCERT Solutions for all the subjects like CBSE Class 9 Information Technology Convergence and Computing Technology, Extramarks has all its courses and content aligned with the CBSE curriculum. Prepare yourself for a better tomorrow with Extramarks. "https://www.extramarks.com/ncert-solutions/cbse-class-9/foundation-of-information-technology-convergence-and-computing-technology