Input device

Input device

1. Input device

   • Keyboards
     • Uses
       • used to input data into applications software
     • Advantages
       • fast entry of new text
       • well-known method of entry/ well-tried technology
       • easy to use
       • easy to do verification checks as the data is entered
     • Disadvatnages
       • hard to use for disabled users
       • slow at entering data than direct data entry (optical mark recognition)
       • large devices that use up desk space
   • Concept keyboard
     • Uses
       • uses icons or phrases instead of letters
     • Advantage
       • fast data entry
       • waterproof = useful in different environment
   • Numeric keypads
     • Uses
       • used in automatic teller machines (ATMs)
       • used in telephones
     • Advantages
       • faster than standard keyboard for entry of numeric data
       • very easy to carry
     • Disadvantages
       • difficult to use (small keys)
       • difficult to enter text
       • the order of the numbers on the keypad isn't intuitive
   • Mice/Touchpads
     • Uses
       • used for opening, closing, minimising software, grouping, moving, deleting files
       • used for controlling the position of a pointer
     • Advantages
       • fast to select an opotion
       • enable rapid navigation through applications
       • take up little area
     • Disadvantages
       • hard to use for disabled users
       • easily damaged
       • difficult to use if there is no flat surface readily available
   • Trackerballs
     • Uses
       • same control capability as a mouse
       • used in a control room environment, to navigate faster than mouse
     • Advantages
       • do not need the same find control as mouse
       • easier to use for people with limited hand
       • pointer can be position accurately than mouse
     • Disadvantages
       • not supplied with the computer as standard= more expensive
       • may need training
   • Remote controls
     • Uses
       • most home entertainment have remote controls
       • used to control multimedia systems
       • used in industrial applications= remotely control process
     • Advantages