Input and Output Devices

Input and Output Devices

1. Input Devices

   • Mice
     • A pointing device used commonly with desktop computers.
     • Mice have a lot of functional issues.
     • Mice can cause R.I.S.
   • Microphones
     • Microphones are devices that convert sound in order to transmit it to the computer
     • They stop working properly very easily
     • There are many problems with signal when using microphones
   • Game Controllers
     • Device used to provide input to a video game and control someone or something in the game
     • Game controllers can imrove hand-eye coordination
     • Disabled people find it difficult to use
   • Keyboard
     • Device used to type text into a computer
     • Can cause R.I.S.
     • Not made for the use of disabled people.
   • Touch Screens
     • Device that allows user to interract with a computer by touching a screen
     • Touch screens are easy to use
     • They are not very accurate, mistakes are easily made.
   • Web Cams
     • A video camera that streams its image to the computer
     • Make seeing people across long distances possible
     • Hackers can turn web cams on without the owner's consent
   • Scanners
     • Device that can digitalize paper.
     • The quality of the scanned document can be of very poor quality
     • Makes sharing documents very easy
   • Radio frequency identification
     • Technology that identifies and transmits the identity of an object.
     • They are very efficient
     • They are very expensive
   • Digital Cameras
     • Camera that can create images and display them on screen
     • They waste battery energy
     • They do not last long
   • Barcode Scanners
     • They are expansive
     • Device that can read printed barcodes
     • They reduce the rate of human error.

2. Output devices

   • Speakers
     • Device that converts and records sounds
     • Good for entertainment purposes
     • They are simple to use
   • Printers
     • Uses a lot of paper which is a natural resource
     • Machine that can print text or pictures
     • Printer maintenance costs a lot.
   • Plotters
     • Prints vector graphics
     • Have a high resolution
     • Take up more space than regular printers
   • Projector
     • People can see an image from a certain distance
     • Device that projects light
     • Image projected may be of poor quality
   • Radio
     • Device that makes communicating by the use of electromagnetic waves possible
     • The line gets fuzzy easily
     • Can be used almost anywhere
   • Television
     • Is very time consuming
     • Good for entertainment purposes
     • Device that uses television signals
   • Headphones
     • Good for entertainment purposes
     • Don't last long
     • Device used to listen to audio signals
   • Screens
     • Devices that display computer output to users
     • Some have poor resolution
     • They can break easily
   • Automotive navigation system
     • System that shows direction by satellite navigation
     • It is very expansive
     • Can give wrong directions .
   • Disk Drive
     • They have function problems
     • It can give the possibility to read and write from a computer
     • It is hard to move from one computer to another