Parts of a computer

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Across
  1. 1. Whole system
  2. 3. You cant touch it
  3. 4. Perminatly stored information
  4. 6. Temperarily stored information
  5. 7. "Brains" of the computer
  6. 9. Stores documents and files
  7. 11. Most important piece of software
Down
  1. 2. Controls alll function of the computer
  2. 5. Can be put into a computer
  3. 8. You can touch it
  4. 10. Cann be brought out of a computer