1. Who invented Floppy disk ?

Answer: IBM in 1970

2. Who invented Safety razor ?

Answer: King Camp Gillette of U.S.A. in 1903

3. Who invented CT scan ?

Answer: Hounsfield by Britain in 1973.

4. Who invented Steam Engine ?

Answer: Thomas Savery of Britain in 1698

5. Who invented Helicopter ?

Answer:

Igor Sikorsky

6. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

7. Who invented Biochemistry ?

Answer: Jan Baptista Van Helmont of Belgium in 1648.