A computer is one of the greatest inventions made by humans. It is an electronic machine that helps us to do many kinds of work quickly and easily. The computer has become an important part of our daily life. Today, it is used in almost every field such as education, medicine, business, communication, and even at home. The word “computer” comes from the word “compute,” which means to calculate. In the beginning, computers were made mainly for solving mathematical problems. But now, computers are used not only for calculations but also for storing data, making documents, playing games, watching movies, listening to music, and connecting with people all around the world. A computer works with the help of two main parts — hardware and software. Hardware means the physical parts of a computer that we can see and touch, like the monitor, keyboard, mouse, CPU, and printer. Software means the set of instructions that tells the computer what to do. Examples of software are Windows, MS Word, ...