Prepared by : Cikgu Dk. Noor Afizah

Introduction

•How do we communicate to the computer ?

•How the computer communicate to us?

Introduction

Computer use output devices to present information.

Examples :•Monitor•Speaker•Printer

Monitor• Function : To display screen of a computer

Monitor Screen

• Screen resolution : refer to the number of pixel that can be displayed on the screen.

• High resolution monitor : Quality of the picture is good because of the high number of pixels.

Do you know what are the difference

between CRT Monitor and LCD

Monitor?

Difference between CRT Monitor and LCD Monitor

CRT Monitor

• Cheapest • Large • bulky size• Noisy• Heavy• Generate a lot of heat

LCD Monitor

• Expensive than CRT• Flatter• Less bulky• Highly quality

display• Lighter• Consumes less

electricity

Speaker

Function : To project sounds from the computer.

Printer

• Function : to create a printed copy of the computer.

• Printer resolution : refer to how closely the printer can prints dots.

• Measured in dpi ( dots per inch )

Difference between 3 Printer

• Bulky• Cheap• Low draft

Quality

• Lighter• Expensive• Near letter

Quality

• Expensive• Heavy• Letter quality

Group Discussion ( 20 minutes )

1.Make a group into three.2.Use google search to find picture and function of 

o Plottero Projectoro Computer output on Microfilm

– Put your information into Microsoft PowerPoint– Present your finding to teacher and your friends.