1. Who invented Floppy disk ?

Answer: IBM in 1970

2. Who invented Steam Engine ?

Answer: Thomas Savery of Britain in 1698

3. Who invented Calculus ?

Answer: Newton of Britain in 1670.

4. Who invented Ball-Point Pen ?

Answer: John J. Loud of U.S.A. in 1888

5. Who invented colour television ?

Answer:

Peter Carl Goldmark

6. Who invented Vitamin D ?

Answer:

Edward Mellanby discovered Vitamin D while researching a disease called rickets in 1922

7. Who invented HIV ?

Answer: