Functions and Components of Computer Systems: Input, Processing, Output, and Storage, Study notes of Computer Fundamentals

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M A J O R F U N C T I O N S O F S Y S T E M S

A General Purpose Computer

System

The four Main Functions of a Computer System

 There are four main functions of a computer system:  Input  Processing  Output  Storage  There are four main functions of a computer system:  Input  Processing  Output  Storage

 Input : the transferring of data into a computer system.  Processing : the manipulation and control of data within the computer system. This is handled by the Control Unit and the Arithmetic Logic Unit.  Storage : means by which information can be stored for later retrieval.  Output : the displaying of information. E.g. On monitor or printed paper. Computer ProcessingComputer Processing  Input : the transferring of data into a computer system.  Processing : the manipulation and control of data within the computer system. This is handled by the Control Unit and the Arithmetic Logic Unit.  Storage : means by which information can be stored for later retrieval.  Output : the displaying of information. E.g. On monitor or printed paper.

Data  Data is the raw facts and figures that are meaningless and have no structure until they are processed.

The computer system  The computer system consists of:  Hardware  Software

Hardware  Hardware is all the physical components that are connected to the computer system.  These components are the ones you can see and touch.  Peripheral devices refer to those hardware components that are outside the system unit.  These include devices such as keyboard, mouse, scanner, hard drive, floppy drive, printers, monitors  Hardware is all the physical components that are connected to the computer system.  These components are the ones you can see and touch.  Peripheral devices refer to those hardware components that are outside the system unit.  These include devices such as keyboard, mouse, scanner, hard drive, floppy drive, printers, monitors