What is the difference between TTL and rs232?

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  2. #rs232
  3. #practice
  4. #connect
  5. #defines
  6. #difference
  7. #although
  8. #polarity
  9. #serial
  10. #scanners
  11. #already
  12. #interface
  13. #ports
  14. #volts
  15. #drops
  16. #standard
  17. #compliant
  18. #actually
  19. #signal