Input and output

Input and output

1. Input: a device through which energy or information enters a system.

   • camera
   • scanner
   • keyboard
   • calculator

2. Output: a place where information or power leaves a system.

   • printer
   • speaker
   • projector
   • Screen

3. supermarket self-checkout machine

   • Barcode scanner scans the price of the item through the barcode
   • Speakers: A voice will tell the customer what to do next
   • Baggage sensor: The weight of the items put on the bagging area
   • Receipt printer: The receipt for the customer comes out of the machine
   • Credit card reader: The cards information to be able to pay
   • Touch screen: The fresh fruit or veg being purchased is found on the database
   • Coin/note hole: The money being used to pay with is inserted
   • Screen: Gives the customer information such as the price