Crossword

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123456789101112131415161718
Across
  1. 3. UNIX
  2. 7. driver
  3. 8. architecture
  4. 10. program
  5. 13. kernel
  6. 15. command
  7. 17. debug
  8. 18. instance
Down
  1. 1. application
  2. 2. instruction
  3. 4. GUI
  4. 5. hardware
  5. 6. PC
  6. 7. device
  7. 9. code
  8. 11. RAM
  9. 12. system
  10. 14. ROM
  11. 15. CPU
  12. 16. DOS