1. Who invented paper ?

Answer:

Cai Lun

2. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

3. Who invented c language

Answer:

Dennis Ritchie

4. Who invented DNA Structure ?

Answer: Crick(UK), Waston(US), Wilkins(UK) in 1951

5. Who invented Printing Press ?

Answer:

Johannes Gutenberg

6. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

7. Who invented by Electric Lamp ?

Answer: Thomas Alva Edison of U.S.A. in 1879