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  1. Astronomical Clock in Prague
  2. Bicycle radio antenna, 1914
  3. Measuring electric current
  4. Solar panels
  5. NASA, Houston, Texas
  6. Patent--Sewing Machine
  7. Gaulard transformer, 19th century
  8. Welders Goggles I
  9. Painting of a Weather Satellite
  10. Vintage Parchment Wall Phone Patent Poster
  11. Wind turbine
  12. Distillery, 19th century
  13. TV/radio antenna and relay dishes, California
  14. Circuit
  15. West Virginia, Green Bank, National Radio Astronomy Observatory
  16. Early petrol locomotives
  17. Electric light bulb
  18. Computer and mouse with flora design
  19. Car design
  20. Wire Frame Render of a Clock Mechanism
  21. Early video phone system, 1930
  22. Communication Satellite, Brewster, Washington
  23. Early telephone, historical artwork
  24. Digitally generated abstract cityscape in purple
  25. Fiber optic cables
  26. Television chassis on an assembly line with women workers in a US factory, July 1949
  27. Keyboard
  28. Wire Frame Render of a Clock Mechanism, Close-up
  29. National Radio Astronomy Observatory, Green Bank, West Virginia
  30. German WWII ramjet engine blueprint
  31. Nasmyth's steam hammer, artwork
  32. Computer circuits
  33. Steam-powered coach, 1829
  34. Oscilloscope showing voltage/time trace
  35. Distillation apparatus, 19th century
  36. Computer machinery with laser
  37. Armillary sphere, 18th Century artwork
  38. Computer Keyboard Made of Stones
  39. Solar power plant, California
  40. Marie Curie
  41. Telegraph Key (Morse Code) Type J-37
  42. Early electric train
  43. Fiber optic cables
  44. Electronic and biologic systems, artwork
  45. Concentrating Solar Power Plant
  46. Electrical cables
  47. Connections being made to microchip
  48. Rainhill Trials steam trains, 1829