COMPUTER

Computer an electronic device an information processing machine works under the control of a stored program

Characteristics of Computer

* Speed * Intangible benefits * Accuracy * Reduced cost * Reliability * The Internet * Storage capability

Mouse

Monitor

Speaker

System

Keyboard Microphone

Display Screen/ Desktop area

COMPUTER SYSTEM

Input OutputProcessing

How does a computer work?

INPUT

OUTPUT

Data and Information

Information processing

* Data received by a computer via its input devices

* Stored in memory prior to processing

* Data get processed

* Results sent to the output devices

INPUT DEVICES

Mouse

Scanner

Tracker ballTouchscreen Light pen

Graphic tablet

Magnetic stripe reader

Voice recognition

Barcode readerDigital camera

Microphone

OUTPUT DEVICES

Dot matrix printer

CRT Screen LCD screen

PlotterLaser printerInkjet printer

speaker