Output devices
Once the data is entered into a system, it is processed and an output is produced. This output can be presented to the user is a variety of way: for an example of printed document.
Speaker: output audio, music or sound effects.
Advantage:
- Everyone in the room can hear.
Disadvantage:
- May annoy people who work in offices.
- High quality speaker can be expensive.
Multimedia Projector: is project on a large board where lots of people can see.
Advantage:
- Many people to clearly view the same powerpoint.
Disadvantage:
- Lower image quality compare to a computer screen.
- Very expensive to buy.
TFT monitor: is thin flat screen for computer used.
Advantage:
- Light weight so they are perfect for portable laptop.
- They do not take up much space.
Disadvantage:
- Image can appear unclear when view from different angle.
- Lower picture quality.
Cathode Ray Tube (CRT) Monitor: presents text and graphics visually using a cathode ray tube but being gradually replaced by LCD based screens.
Advantage:
- Bright, clear display.
- Low initial cost.
- Can display text, graphics, photos and videos.
- Reading documents on screen saves paper.
- A wide viewing angle.
IGCSE ICT 