Input and Output Devices Unit 2

Input and Output Devices Unit 2

1. Input Devices

   • There are hardware devices that allow data to be input into a computer.
     • Keyboards
       • Uses
         • Input of data into applications software.
         • Typing in commands to the computer.
       • Disadvantages
         • Can be difficult to use if the user has limited arm/wrist use.
         • Slow method when compared to direct data entry.
         • Fairly large device that uses up valuable desk space.
       • Advantages
         • Fast entry of new text into a document.
         • Easy to use for most people.
         • Easier to do verfications checks as data is entered.
     • Numeric Keypads
       • Advantages
         • Faster than standard keyboards when entering numeric data.
         • They are very easy to carry around.
       • Uses
         • Chip and PIN devices when paying by credit/debit cards.
         • Automatic teller machines (ATMs)
       • Disadvantages