On the outside of a desktop computer

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Across
  1. 1. Where is connected one input / output device on the rear panel?
  2. 4. The power cord is connected to the power ......
  3. 6. The button to turn on a computer
  4. 10. Use less desk space than a mouse
  5. 15. Conteins the main components of the computer
  6. 16. Where the microphone is plugged in
  7. 17. To view anything on your computer
  8. 18. The old input ports for keyboards and mouse
  9. 19. The port to go on the Internet
Down
  1. 2. The most common type of computer case
  2. 3. Where the sound get out from a computer
  3. 5. The type of drive which reads and writes CD or DVD
  4. 7. The slots which allow you to upgrade your computer
  5. 8. Universal Serial Bus
  6. 9. Card that displays images and texts on the screen
  7. 11. The computer which combines the monitor and case into a single unit
  8. 12. Displays which don't use much desk space
  9. 13. The port to connect the older printers
  10. 14. Used to control the pointer on the screen