INPUT AND OUTPUT DEVICES: OUTPUT Flashcards
Types of output devices?
- Basic-essential eg monitor printer speakers
2. Special-non essential eg plotter
types of printers?
- Inkjet-sprays ink to the paper
- Laserbeam-focused beam of light
- Impact-Physical contact
- Thermal-heat receipts
What is the function of a plotter?
For printing high quality graphics eg building blueprints
Difference between Virtual Reality and Augmented Reality
VR- Creates a simulated 3D environment. No ambient light from the surrounding
AR-Superimposes images and audio over the real world. Allows ambient light from the surroundings
Draw the Von Neumann Architecture
See in Exe book
What is accessibility and give examples
How easy to use a system is for disabled people eg
Voice rec & speech to text software instead of typing
Screen Reader- text to audio
Screen Magnifier
On screen Keyboard that can use a pointing device
What is ergonomics and give an example
Setting up the computer and work place in such a way to meet the users needs and reduce strain on the user eg an ergonomic keyboard which may come in with a built in palm or wrist support
Practices of a good working environment
- Appropriate positioning to reduce strain
- Mouse Mat
- Moniter filter
- Adequate lighting and ventilation
- Frequent breaks
- Back supporting chair
- Make sure power points are not overloaded
Health Problems associated with a computer
- Repetititive strain injury(wrists
- Eye strain
- Back problems