Engineering & technological world

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Across
  1. 4. Process of creating items
  2. 6. Study of limbed machines
  3. 13. Physical equipment. Fixed on computers.
  4. 14. Setup and managment of wires
  5. 15. Cloud of water or other substances, used in locomotives
  6. 16. Examination of something and its functions
  7. 17. Path of electric current, part of electrical devices
  8. 20. Group of CPUs with a common instruction set
  9. 22. Science of ciphering messages
  10. 24. Network connecting distanct places in computers
  11. 26. Study of electrical devices
  12. 27. Thing that calculates and runs programs
  13. 29. Composition of structure of a model
  14. 31. Protection measures
  15. 33. First model used on testing
  16. 34. Machine turning energy into motion
  17. 35. Device using energy to work, associated with moving parts
  18. 37. Science of (literal) matter
  19. 38. Technical drawing of a model
  20. 39. Science of numbers
Down
  1. 1. Complex machine or organization
  2. 2. Organization of structures
  3. 3. Drawing of something, like a device
  4. 4. Study of moving machines
  5. 5. World separated from reality
  6. 7. Test of something, usually separated from reality
  7. 8. Apparatus of businesses of same type
  8. 9. Examining a theory, prelude to realization
  9. 10. Things alleviating illness
  10. 11. Computer program. Antithesis of hardware.
  11. 12. Assembled structure
  12. 18. Computer instructions before compilation
  13. 19. Knowledge through defined principles
  14. 21. Science of substances
  15. 23. Set of computer instructions after compilation
  16. 25. Things required to construct something
  17. 28. Thing powering electrical devices
  18. 30. Collection of data from the distant past
  19. 32. Resource behind motion and activity
  20. 36. Process of studying