According to a survey of 4,000 Brits.
1. Wheel
2. Airplane
3. Light bulb
4. Internet
5. PCs
6. Telephone
7. Penicillin
8. iPhone
9. Flushing toilet
10. Combustion engine
Interesting to note that the iPhone is before the flushing toilet.
11. Contraceptive pill 12. Washing machine 13. Central heating 14. Fridge 15. Pain killers 16. Steam engine 17. Freezer 18. Camera 19. Cars 20. Spectacles (glasses) 21. Mobile phones 22. Toilet paper 23. Hoover (vacuum cleaner) 24. Trains 25. Google