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Computer Science IGCSEPDF 28
142 pagesrevision 46930
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Device
Function
Where is it used Why is it used
Keyboard
Microphone
Touch Screen
(Resistive)
Touch Screen
(Infrared)
Touch Screen
(Capacitive)
Optical Mouse
Digital Camera
Barcode Scanner
QR Code Scanner
Scans barcodes to collect
product information.
Scans QR codes to retrieve
stored information.
Converts analog sound into
digital signals by capturing
audio.
Senses touch by detecting
changes in electrical charge
on the screen surface.
Registers touch by breaking
infrared light beams across
the screen.
Senses touch through
pressure on a flexible screen
layer.
Records photos or videos as
digital files.
Controls the on-screen cursor
by tracking hand movements
across a surface.
Allows text and commands to
be entered through key
presses.
Computers
Tablets
Laptops
Computers
Laptops
Retail shops
Mobile apps
Supermarket
Warehouses
Photography
Smartphones
Recording studios
Smartphones
Computers
ATMs
Older smartphones
and tablets
Kiosks
Large touch displays
Modern smartphones
Tablets
Touchmonitors
Smooth, responsive
touch multi-touch
capabilities
Direct interaction with
the device
Audio recording Voice
communication
Quickly retrieves data
from QR codes Website
links or product
information
Type documents Enter
data
software
Control
Accurate touch detection
Works well in various
lighting conditions
Efficiently retrieves
product information for
inventory and checkout.
High-quality visual
content
Precise control and
navigation on a computer
screen