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Computer Science IGCSEPDF 30
142 pagesrevision 46930
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Laser printer
Heat from a laser fuses
toner (fine powder) onto
paper
Offices
Schools
High-quality prints
Fast print speed
Light Emitting
Diode (LED) screen
Displays images and video
using tiny lights called
LEDs
Televisions
Computer monitors
Smartphones
High-quality images
Bright
Energy efficient
Thin
Liquid Crystal
Display (LCD)
projector
Projects images or video
onto a screen using light
and liquid crystal panels.
Offices
Classrooms
Homecinemas
Bright
Excellent balance of
quality and affordability
Liquid Crystal
Display (LCD)
screen
Uses liquid crystals and a
backlight to display
images and video.
Televisions
Monitors
Smartphones
Laptops
Energy efficient
Thin
Sharp images
Lightweight
Multiple shapes and sizes
Speaker
Converts electrical signals
into analogue sound waves
to play music
Televisions
Radios
Smartphones
3d printer
Adds thin layers of plastic,
one on top of another to
form a three dimensional
object
Manufacturing
Medicine
Education
Home
Create prototypes
Custom parts
➤ Sensors
● Sensors are input devices that measure physical properties
like light, temperature etc.They are used in monitoring and
control systems.