A computer system
A computer system is a collection of components that work together to process do.
The purpose of a computer system is to make it as easy as possible for you to use computer to solve problems. A functioning computer system combines hardware elements with software elements.
The hardware elements are the mechanical device, the system, the machinery and the electronics. The software elements are the programs written for the system. Collectively these components provide a complete computer system.
Usually, a computer system requires three basic hardware items: the central processor unit, which performs all data processing; a terminal device, which helps users to communicate with their computer system and a memory storing programs and data. These three devices are the required hardware components of any computer system. Computer system includes many other devices: printer, scanner and a modem. These computer devices called hardware.
A set of instructions telling a computer what to do is a program.
Programs are usually written in a Programming languages like Pascal, C++, etc, they (programs) deal with are organized into files. Applications are programs for specific tasks.
Applications include: database soft, spreadsheets calculations, word-processing on a word processor. To function hardware and software, a computer needs an operation system program.
Some operation systems require users to type in commands to tell the computer the to do.
Many computers use a graphical interface or point-and-click interface such as Windows.
Some interfaces allow plug-and-play, the possibility of connecting new hardware the computer without having to adjust or configure the system to take the new hardware into account: the interface program recognizes the hardware automatically.