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  1. Scanning electron microscope
  2. Armillary sphere, 18th century artwork
  3. Close-up of computer keys on a document
  4. Circuit Board Tin Contacts
  5. Circuit Board Tin Contacts
  6. 1920s television system, diagram
  7. Close-up of an industrial ventilation fan
  8. Electric Tattooing Device, Charles Wagner, 1904
  9. Coloured X-ray of a 17-jewel wrist-watch
  10. 19th Century electrical equipment
  11. 19th Century internal combustion engine
  12. First Atom Bomb Test Site
  13. Hydraulic Systems
  14. Early television with a viewing mirror that reflects the image of a picture tube
  15. Telephone switchboard operator, 1914
  16. Electronic components
  17. Digital Engine
  18. Circuit Board Tin Contacts
  19. Brewery kettle, 19th century
  20. Microchips
  21. Patent--Hot Air Balloon
  22. Phoning I
  23. Newton's telescope. 1668. Sir Isaac Newton
  24. Vintage Rotary Phone
  25. Computer memory chips
  26. Cold War medical training, 1958
  27. iPod Patent Blue
  28. General Electric Motor Factory
  29. Standard electrical circuit symbols
  30. Apollo 11 Moon Plaque, 1969
  31. Wrist watch interior
  32. Computer hard disc
  33. Printed circuit board
  34. Magic Money
  35. Water mill and pump, 18th century
  36. 19th Century internal combustion engine
  37. Bellis and Morcom steam engine
  38. 50 Kilowatt Broadcasting Modulator
  39. High-pressure steam engine, 19th century
  40. Measuring electric voltage
  41. Early American steam locomotive
  42. German WWII ramjet bomber blueprint
  43. Measuring electric current
  44. Pascal's calculator, 17th Century artwork
  45. SCSI card
  46. Solar panels
  47. Edison talking into his phonograph
  48. Bicycle radio antenna, 1914