Input Devices (Cambridge (CIE) O Level Computer Science)

Barcode Scanner

• Reads barcodes to capture product information.

• Supermarkets

• Warehouses

• Libraries

• Quickly and accurately retrieves product details for stock and checkout

Digital Camera

• Captures photographs or videos as digital images

• Photography

• Smartphones

• Webcams

• High-quality visual content

Keyboard

• Inputs text and commands by pressing keys

• Computers

• Tablets

• Laptops

• Type documents

• Enter data

• Control software

Microphone

• Captures analogue sound and converts it into digital signals

• Recording studios

• Smartphones

• Computers

• Audio recording

• Voice communication

Optical Mouse

• Moves the cursor on the screen based on hand movements over a surface

• Computers

• Laptops

• Precise control and navigation on a computer screen

QR Code Scanner

• Reads QR codes to access stored information

• Retail shops

• Mobile apps

• Quickly retrieves data from QR codes

• Website links or product information

Touch Screen (Resistive)

• Detects touch by pressing a flexible screen layer

• ATMs

• Older smartphones and tablets

• Direct interaction with the device

Touch Screen (Infra-red)

• Detects touch by interrupting infrared light beams across the screen

• Kiosks

• Large touch displays

• Accurate touch detection

• Works well in various lighting conditions

Touch Screen (Capacitive)

• Detects touch through changes in electrical charge on the screen surface

• Modern smartphones

• Tablets

• Touch monitors

• Smooth, responsive touch experience with multi-touch capabilities

Two-Dimensional (2D) Scanner

• Captures flat, 2D images of documents or photos

• Offices

• Libraries

• Schools

• Digitises documents and photos for storage, editing, or sharing

Three-Dimensional (3D) Scanner

• Captures detailed 3D shapes and dimensions of objects

• Manufacturing

• Design

• Medical imaging

• Creates digital models of objects for design, analysis, or reproduction