1. 2. main circuit board of computer
  2. 4. device that connects two or more packet-switched network
  3. 7. an optical device that projects an image onto a surface, commonly a projection screen
  4. 9. a jack or socket that peripheral hardware plugs in
  5. 11. the process of taking in information from the world around us,
  6. 12. a plate placed at or forming the back of something.
  7. 14. an input device consisting of a stick that pivots on a base and reports its angle or direction to the device it is controlling.
  8. 17. to offer audio output for the listener.
  9. 18. machine connected to computer to make copies
  1. 1. thick wire, or a group of wires
  2. 2. a device that translates sound vibrations in the air into electronic signals
  3. 3. sound that is within the acoustic range of human hearing
  4. 5. a device that captures images from photographic prints
  5. 6. software component that lets the operating system and a device communicate with each other
  6. 8. small digital video camera directly or indirectly connected to a computer
  7. 9. is a printer that interprets commands from a computer to make line drawings on paper with one or more automated pens
  8. 10. piece of metal that sits on top of a computer
  9. 13. small, movable device that lets you control a range of things on a computer
  10. 15. input device to enter numbers
  11. 16. case or covering