Computer devices like keyboard, mouse, printer, etc. Primary memory resides within the CPU whereas secondary memory is external to it.Ĭontrol unit, arithmetic logic unit and memory are together called the central processing unit or CPU. Memory is of two types – primary memory and secondary memory.

Memory − All input data, instructions and data interim to the processes are stored in the memory. All devices or parts of computer interact through the control unit.Īrithmetic Logic Unit − This is the brain of the computer where all arithmetic operations and logical operations take place. Output Unit − Devices like printer and visual display unit that are used to provide information to the user in desired format are called output unit.Ĭontrol Unit − As the name suggests, this unit controls all the functions of the computer. Input Unit − Devices like keyboard and mouse that are used to input data and instructions to the computer are called input unit. The basic parts of a computer are as follows − The corresponding figure for an actual computer looks something like this − Logical operations − Examples include comparison operations like greater than, less than, equal to, opposite, etc.The processes that can be applied to data are of two types −Īrithmetic operations − Examples include calculations like addition, subtraction, differentials, square root, etc. Raw facts and figures which can be processed using arithmetic and logical operations to obtain information are called data. Input-Process-Output ModelĬomputer input is called data and the output obtained after processing it, based on user’s instructions is called information. Computer is an electronic device that receives input, stores or processes the input as per user instructions and provides output in desired format. However, modern computers can do a lot more than calculate. The literal meaning of computer is a device that can calculate. Let us start with defining the term computer formally. As they are such integral parts of our lives, we must know what they are and how they function. Be it school, banks, shops, railway stations, hospital or your own home, computers are present everywhere, making our work easier and faster for us. This is because they are an integral part of our everyday existence. Being a modern-day kid you must have used, seen, or read about computers.

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