1. Who invented Calculus ?

Answer: Newton of Britain in 1670.

2. Who invented Laptop ?

Answer:

Adam Osborne in 1981.

3. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

4. Who invented Electron ?

Answer: Thomson. J of Britain in 1897

5. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903

6. Who invented Floppy disk ?

Answer: IBM in 1970

7. Who invented Piano ?

Answer:

Bartolomeo Cristofori