Input and Output devieces

Input and Output devieces

1. Input

   • Keyboard
     • Concept Keyboard
       • Disadvantages
         • Can be difficult to use if the user has limited arm.
       • Advantages
         • Fast data entry
     • Numeric Keypad
       • Disadvantage
         • Sometimes the order of the numbers on the keypad is not intuitive.
       • Advantages
         • Faster than standard keyboards
     • Asvantages
       • Easy to use, fast entry.
     • Disadvantages
       • Fairly large deviece that uses up valuable desk space.
   • Mouse
     • Advantage
       • Faster way to choose an option
     • Disadvantage
       • Difficult to use if there is not a flat surface
   • Remote control
     • Advantages
       • Can be operated from any reasonable distance
     • Disadvantages
       • Difficult to use if the operator has limited hand
   • Touchscreen
     • Advantages
       • Faster entry of option
     • Diadvantage
       • Limited number of optionsavailable

2. Output

   • Monitors
     • Advantages
       • The angle of viewing is still better
     • Disadvantage
       • They tend to be rather heavy
   • Printers
     • Advantages
       • Prints fast
       • Very chip to buy and maintain
       • HIgh quality
     • Disadvantages
       • Very noisy
       • They produce ozone and volatile organic compounds
   • Projectors
     • enables many people to see a presentation
     • Images can be fuzzy