Advantages and Disadvantages of Input and Output Devices

HideShow resource information
  • Created by: Jamie Lee
  • Created on: 07-03-13 17:51

Keyboard

Advantages:

  • They use a simple, old fashioned technology with little that can go wrong.
  • People feel comfortable using them.
  • They are easy to use.
  • They are cheap to purchase.

Disadvantages:

  • Keyboards are slow compared with some more automated input devices such as bar code readers.
  • It can be hard to learn to type quickly.
1 of 25

Concept Keyboards

Advantages:

  • Number of symbols can be restricted so it is easier to use.
  • Quick to input data.
  • Good to use in places like takeaways to input an order quickly and easily.

Disadvantages:

  • A restricted number of symbols can also be a disadvantage because it makes it difficult to produce any input outside a very limited group of inputs.
2 of 25

Mouse

Advantages:

  • They provide a fast method of input.
  • They are intuitive to use because they involve pointing at things.
  • They are cheap to buy.

Disadvantages:

  • Mice can be easily damaged or vandalised.
  • Some people, particularly if they have a physical disability, can find them difficult to use.
  • Mice need a flat surface to be moved around on.
3 of 25

Touchpad

Advantages:

  • Integrated into a laptop for easier transport.

Disadvantages:

  • Touchpads can be very small compared to the size of the computer screen.
  • Some peopel find them harder to use than mice.
4 of 25

Trackerball

Advantages:

  • A trackerball is stationery and does not need a surface to be moved around on.
  • It can be built into a machine like an information system and is nor likely to get damaged as easily as a mouse.
  • It can also be used by disabled people who may not have the freedom of movement necessary to use other pointing devices.

Disadvantages:

  • Can be difficult to use for some applications needing fine control.
5 of 25

Joysticks

Advantages:

  • Joysticks are used to play many games because they give the user the impression of being in control. There is also a direct and immediate result of the player's actions which adds to the enjoyment of the game.
  • They are used to control aircraft because of their simplicity in a very complex environment.
  • Severely Disabled people can use them to control motorised wheelchairs because they allow the user to give many different commands with very little physical movement.

Disadvantages:

  • It is more difficult to control the fine movement of the pointer on the screen than with a mouse.
6 of 25

Touchscreens

Advantages:

  • They are difficult to vandalise compared with something like a mouse.
  • They are largely weatherproof so can be in the open air like a station platform.
  • They need no computing knowledge at all to be able to operate them.

Disadvantages:

  • Disabled people can find them difficult to use.
7 of 25

Graphics Tablet

Advantages:

  • Great level of accuracy.
  • Easy to draw and write on the computer.

Disadvantages:

  • Not suitable for general use.
  • They are usually expensive.
8 of 25

Light Pen

Advantages:

  • More Direct.
  • Convenient for Applications.

Disadvantages:

  • Require specially designed monitor.
9 of 25

Scanners

Advantages:

  • Accurate and can produce high quality images.
  • All images can be scanner and enhanced with a graphics app.

Disadvantages:

  • Images take up too much memory
  • Images can lose quality when being scanned.
10 of 25

Digital Camera

Advantages:

  • No film required.
  • Images can be viewed on the camera
  • Images can be deleted on the camera
  • Images can be edited on the camera

Disadvantages:

  • More expensive
  • Images must be downloaded from the camera onto a computer
11 of 25

Webcams

Advantages:

  • Easy to watch real time video
  • Stay connected to family members
  • Can be left on permanently
  • Hold video conferences.

Disadvantages:

  • Need to be connected to a computer has they have no memory.
  • Usually low quality.
12 of 25

Microphones

Advantages:

  • Input is easier than using a computer.

Disadvantages:

  • Sound recognition software through a microphone can be unreliable.
13 of 25

Remote Controls

Advantages:

  • Simple to use
  • Convenient

Disadvantages:

  • Advanced models have buttons only.
  • Signal can interfere with other equipment.
14 of 25

Optical Character Recognition (OCR)

Advantages:

  • Increases the efficiency and effectiveness of work.
  • Can quickly convert written text into an electronic and editable version.

Disadvantages:

  • It may not convert the data accurately.
  • For a more accurate conversion, more expensive software is usually required.
15 of 25

Optical Mark Recognition (OMR)

Advantages:

  • Efficient way to input data into the computer.

Disadvantages:

  • Documents for the OMR are complicated to design.
  • The user has to follow the instructions.
  • User can only make marks, not write information.
16 of 25

Magnetic Ink Character Recognition (MICR)

Advantages:

  • Documents are difficult to forge.
  • Documents can be read.

Disadvantages:

  • It is expensive.
  • It will only accept authorised characters.
17 of 25

Chip and Pin Readers

Advantages:

  • The information is secure because the chip is difficult to read.
  • Efficient way of paying for items without using cash.

Disadvantages:

  • People tend to be careless when using their pin.
18 of 25

Senors

Advantages:

  • Useful and help security problems
  • Protect your valuables
  • Easily assessable
  • Can be used to control things.
  • They are more reliable than human beings.
  • A human could take inaccurate readings.
  • It is not possible for humans to go to some places where readings need to be taken.

Disadvantages:

  • They require a power source, if there is a power cut they will stop working and not take required readings.
  • They can be easily set off.
19 of 25

Monitors

Advantages:

  • Instant output of data.
  • You can see what you are doing on the computer.
  • Allows for entertainment (Watch TV and movies etc...)
  • Can view the graphical user interface.

Disadvantages:

  • Can be expensive.
  • Flat screens can be damaged easily.
20 of 25

Multimedia Projectors

Advantages:

  • LCD designs generate better colour saturation.
  • Digital LCD projectors produce better images.
  • Can create a cinema like effect.
  • Can use television signals as their input.

Disadvantages:

  • Require an expensive high power bulb to produce the pictures.
  • The bulbs are very fragile, particularly if it is moved whilst it is hot.
21 of 25

Laser Printers

Advantages:

  • Colour printing is possible.
  • Quality of print outs is high
  • Most models are relatively light and compact so can be placed on a desk without taking up too much space.

Disadvantages:

  • The toner is toxic so the cartridges need to be disposed of carefully.
  • The first copy takes time to print, but the rest are a lot quicker.
  • Laser printers are normally more expensive to buy than inkjets but they are cheaper in the long run. 
22 of 25

Inkjet Printers

Advantages:

  • They print at a high quality.
  • They are cheap to buy making them affordable for family home use.
  • A page can be produced very quickly making them good for home use.
  • They are often light and relatively small.

Disadvantages:

  • They often use water-soluble ink, so if printouts get wet, the ink will run.
  • If a lot of copies are needed, they are often slow.
23 of 25

Dot Matrix Printers

Advantages:

  • They are robust and less likely to go wrong in dirty environments.
  • They are cheap and easily available in the market.
  • They use paper continuously instead of a frequent change in paper.

Disadvantages:

  • They can be very noisy.
  • Printing quality isn't great.
  • Not all can print in colour.
24 of 25

Speakers

Advantages:

  • They are sometimes built into a laptop or monitor.
  • They are simple to operate.
  • Can be used to help a blind person operate a computer.
  • Can be used  to alert the computers user.

Disadvantages:

  • Can distract people around you.
  • High quality speakers are normally quite expensive.
25 of 25

Comments

No comments have yet been made

Similar ICT resources:

See all ICT resources »See all Devices and Storage resources »