CHAPTER 2=COMPUTER SYSTEM

-SYSTEM CONCEPT

--OVERVIEW OF COMPUTER SYSTEM

-Define COMPUTER SYSTEMS.

Computer is an electronic device, operating under the control of instruction stored its 

own memory,

-that can accept data (input)

-process the data according to specified rules (process)

-produce result (output)

-and store the result for future use (storage)

State the MEANING THE INPUT, PROCESS, OUTPUT AND STORAGE.

Input=

-input is any data and instructions entered into the memory of a computer.

There are four types of input which are: text, graphics, audio and video.

Input device=

-Input device is any hardware component that allows user to enter data and instruction

into a computer.

 -e.g. keyboard, mouse, scanner, barcode reader

 -Also pointing devices: mouse, joystick, track ball, touch screen, pointing stick and

graphic tablet.

Processor/ CPU/ Central/ Processing Unit/ Microprocessor=

-CPU is an electronic component on a computer`s motherboard that interprets and

carries out the basic     instructions that operate the computer

-e.g. Intel Pentium IV, AMD Athlon, G4

Output=  

-Output is data that has been processed into a useful from, called information.

Output device=

-output device is any hardware component that present information (processed data)

to one or more people.

-e.g. Speaker, Monitor, LCD Projector, Printer and Plotter.

Storage=

-Storage is a location in which data, instructions, and information are saved for future use.

-e.g. CD ROM, diskette, hard disk.