Importance of Computer
Computer is the key of IT world. First we’ll get an overall knowledge about the computer.
What Is A Computer?
A computer is an electronic machine, operating under the control of instructions stored in its own memory that can accept data, manipulate the data according to specified rules, produce results, and store the results for future use.
Information Processing Cycle
Input is any data or instructions you enter into a computer. Output is data that has been processed into information. Computers process input (data) into output (information). Storage is an area in a computer that can hold data and information for future use. This series of input, process, output, and storage activities sometimes is called the information processing cycle. Most computers today have the capability of communicating with other computers. Thus, communications also has become an important element of the information processing cycle.
The Components of a Computer
A computer consists of a variety of hardware components that work together with software to perform calculations, organize data, and communicate with other computers. These hardware components include input devices, output devices, a system unit, storage devices, and communications devices. Figure 1-3 shows some common computer hardware components
