Computers come in many varieties from from the tiny computers built into household appliances to the astounding supercomputers that have helped scientists map the human genome. But no matter how big or how it is used, every, every computer belongs to a system. A computer system consists of four parts namely
hardware,
software,
data and
user. The mechanical or physical devices that make up a computer are called hardware. Hardware is any part of the computer that you can touch or feel. A computer’s hardware consists of interconnected electronic devices that you can use to control the computer’s operation, input and output. The generic term device thus refers to any piece of hardware. Software is a step-by-step set of instructions that tells the computer what to do. In order words, software makes the computer perform tasks. The term program refers to any piece of software. Some programs exist primarily for computer’s use to aid in its perfomance of tasks and manage its own resources. Other types of programs exists for the user enabling them to perform tasks, creating documents, images, videos and even writing another software program.
