1. Cell phone (USA), 1973
2. Computer (USA), 1946
3. High-speed rail (Germany), 1899.
4. Airplane (USA), 1903
5. Fiber optics (USA), 1970
6. Satellite (Soviet Union), 1957
7. Lithography machine (Netherlands), 1984
8. Washing Machine (USA), 1858
9. Ultrasound (USA), 1950
10. Gastroscopy (Germany), 1868
11. Laser (USA), 1958
12. Television (UK), 1925
13. Automobile (Germany), 1886
14. Liquid Crystal Display (USA), 1960
15. Underground Railway (UK), 1863
16. Elevator (USA) 1852
17. Air conditioning (USA), 1902
18. Gas water heater (UK), 1868
19. Chip (USA), 1958
20. LED (USA), 1962
21. QR code (Japan), 1994
22. Microscope (Netherlands), circa 1590
23. Internet (USA), 1969
24. Dot matrix printer (Japan), 1968
25. Nuclear power plant (former Soviet Union), 1954
26. Code (USA), 1842
27. Nanotechnology (USA), 1959
28. In vitro fertilization (UK), 1978
29. Pacemaker (USA), 1958
30. Hearing aid (USA), 1878.
31. Blockchain (China), 2008. #BTC