Input and Output

Input and Output

1. Input

   • Scanner-A scanner can be used to digitise images.
   • Trackball-To operate it the user rotates the ball which moves the pointer on screen.often used in Computer Aided Design (CAD) for their increased precision over a mouse.
   • Joystick-joysticks are used to control machinery such as cranes.
   • Microphones- are used to input sound.

2. Output

   • Printer-It takes data from the computer for example a word document and prints it.
   • Monitor- A computer monitor is an output device that is used as an electronic visual display for computers. This device allows the user to view program operations.
   • Speakers-Speakers are transducers that convert electromagnetic waves into sound waves. The speakers receive audio input from a device such as a computer