1. Which material did Edison eventually use to create a filament that lasted over 1,200 hours?

2. What programming language is Grace Hopper most closely associated with developing?

3. What existing device did Gutenberg adapt to create his printing press mechanism?

4. What material was the shell of the first computer mouse prototype made of?

5. Which component of a radar system led Percy Spencer to discover microwave cooking?

6. What observation led Laszlo Biro to develop a better writing instrument?

7. How did Elisha Otis demonstrate his safety elevator at the World's Fair?

8. How many dots make up the standard cell in the Braille writing system?

9. How was the Gatling gun operated to fire continuously?

10. What technology from the music industry did Edwin Link adapt to create the first flight simulator?

11. What is the primary purpose of the small tail rotor on a Sikorsky helicopter?

12. What did Faraday's 1821 experiment prove could be converted into mechanical motion?

13. What was the revolutionary idea in the Von Neumann Architecture?

14. What did Josephine Cochrane use to clean the dishes instead of mechanical scrubbers?

15. What was the primary advantage of Whitney's interchangeable parts for the military?

16. What specific feature did Margaret Knight's machine add to paper bags?

17. What was the main limitation of Galileo's thermoscope compared to a modern thermometer?

18. What is the primary function of a 'compiler,' as invented by Grace Hopper?

19. What was the main technical difference between the iPhone's multi-touch and earlier touchscreens?

20. How did Fulton's steamboat overcome the challenge of traveling against river currents?