3.2 - Input and Output Devices Flashcards
Where are barcode scanners used? [2]
- retail stores
- office buildings
What are barcode scanners used for? [1]
- to capture product information so that it can be added to the customer’s purchase total
Where are digital cameras used? [3]
- scientific
- photography
- medical
Why are digital cameras used? [2]
- they have sharper and better detail than film cameras
- used to make digital recordings of images
Where are keyboards used? [2]
- laptops
- personal computers
Why are keyboards used? [2]
- used as a text entry interface for typing letters, numbers and symbols into application softwares
Where are microphones used? [3]
- telephones
- hearing aids
- public address systems for concert halls
Why are microphones used? [2]
- to convert sound waves into an electrical signal
- makes voice louder
Where is an optical mouse used? [2]
- office environments
- schools
Why are optical mouses used? [3]
- used to move cursor
- select objects
- click on buttons
Where are QR Code scanners used? [3]
- restaurants
- public transportation
- to link directly to download an app
Why are QR code scanners used? [2]
- to track information about products in a supply chain
- shows product details
Where is touchscreen used? [2]
- phones
- ipads
Why is touchscreen used? [1]
- enables user to interact directly with what is displayed
Where are 2D and 3D scanners used? [2]
- 3D printers
- airports
Why are 2D and 3D scanners used? [2]
- to collect data about an object
- 2D reads barcodes
Where are actuators used? [2]
- aerospace systems
- industrial automation
Why is an actuator used? [2]
- to control and automate various processes and systems
- helps achieve physical movements
Where is a digital light processing projector used? [2]
- cell phones
- movie projectors
Why is a digital light processing projector used? [1]
- rapidly produces photopolymer parts
Where is an inkjet printer used? [2]
- in offices
- in schools
Why is an inkjet printer used? [1]
- better for printing photos and colour documents
Where is a laser printer used? [2]
- in a home office
- small business office
Why is a laser printer used? [2]
- to print marketing materials and presentations
- provide quality printing with sharp images
Where is a light emitting diode screen used? [2]
- computer monitors
- stadiums
Why is a light emitting diode screen used? [2]
- offers higher contrast ratios than a projector
- easy maintenance
Where is a liquid crystal display projector used? [2]
- electronic billboards
- portable electronic games
Why is a LCD projector used? [2]
- cheaper to produce
- very good colour reproduction
Where are speakers used? [2]
- sound reinforcement in theatres and concert halls
- computers
Why are speakers used? [1]
- allows you to hear audio output from various devices
What is a sensor? [2]
an input device that measures physical properties from the environment
