Comp Sci puzzle

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Across
  1. 2. 2 inports and 1 output. rocket like
  2. 3. to stop trohjons and others getting on
  3. 9. to keeps files as a double.
  4. 10. Ram is mesured in this
  5. 12. what your device is runnign on
  6. 13. It is to keep programs when not using them
  7. 14. The CPU attaches to it
  8. 16. what the device is. Windows, MAC.
  9. 18. You download anti-virus software on there
Down
  1. 1. Squaches everything down into 1 files
  2. 3. 2 inputs 1 outputs and is a semi circle
  3. 4. The HHD is measured in it
  4. 5. To be sue on device. Onedrive is one
  5. 6. Things that are phisical.
  6. 7. it is the central part of your computer
  7. 8. Are Building blocks for computers
  8. 11. It is mesured in Megabytes
  9. 12. what the computer is running on
  10. 15. A amount something can be mesured in and casn be shortend to a 2 letter
  11. 17. 1 input 1 output