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  1. 19th Century furnace for gas lighting
  2. Telecommunication Towers near Bulls Head, Dingle Peninsula, County Kerry, Ireland
  3. Fiber optic cable
  4. Blood centrifuge
  5. Genome sequencing machine
  6. Man and Machine
  7. Light bulb
  8. Palmtop
  9. Light bulb, historical artwork
  10. Parkes radio telescope at night, Parkes, NSW, Australia.
  11. Garnerin's parachute design, 1797
  12. An early telephone
  13. Telecommunication Towers near Bulls Head, Dingle Peninsula, County Kerry, Ireland
  14. Vieques, Puerto Rico, A laptop is sitting in the middle of an unmade hotel bed
  15. Hornblower's engine
  16. Cut-away artwork of a windmill for grinding corn
  17. Computer graphic line graph, full frame
  18. Refractor telescope, 1928
  19. Chain and lock on laptop computer
  20. Hydraulics Explained
  21. Chit Chat
  22. Oscilloscope trace
  23. Solar cell
  24. Television studio engineer gets several views of the image
  25. 19th-century mining machine
  26. German printing press inventors
  27. Actress Norma Shearer inspects a sound proof camera
  28. Boring a hole
  29. United States, Satellite Dish
  30. Grain Mills
  31. Solar park, Ciudad Real, Spain
  32. United States, California, Owens Valley Radio Observatory (OVRO), Radio Telescope
  33. Engraving of the Bullock Rotary Press of 1865
  34. Worker examining empty airplane
  35. Recording thumbprint
  36. Eighteenth Century Illustration Of A New Machine To Go Without Horses
  37. Diamond-tipped drill, 19th century
  38. Lamps connected in series
  39. Early escalator, 1894
  40. Lamps connected in parallel
  41. Various diodes