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  1. Telecommunication Towers near Bulls Head, Dingle Peninsula, County Kerry, Ireland
  2. A black and white image of two light bulbs, one containing running water.
  3. Fiber optic cable
  4. Blood centrifuge
  5. Man and Machine
  6. Genome sequencing 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. Vieques, Puerto Rico, A laptop is sitting in the middle of an unmade hotel bed
  13. Hornblower's engine
  14. Telecommunication Towers near Bulls Head, Dingle Peninsula, County Kerry, Ireland
  15. Cut-away artwork of a windmill for grinding corn
  16. Computer graphic line graph, full frame
  17. Refractor telescope, 1928
  18. An early telephone
  19. Chit Chat
  20. Hydraulics Explained
  21. Chain and lock on laptop computer
  22. Solar cell
  23. German printing press inventors
  24. 19th-century mining machine
  25. Oscilloscope trace
  26. Actress Norma Shearer inspects a sound proof camera
  27. Boring a hole
  28. United States, Satellite Dish
  29. Solar park, Ciudad Real, Spain
  30. United States, California, Owens Valley Radio Observatory (OVRO), Radio Telescope
  31. Grain Mills
  32. Engraving of the Bullock Rotary Press of 1865
  33. Worker examining empty airplane
  34. Recording thumbprint
  35. Television studio engineer gets several views of the image
  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