Crossword

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