1. Who invented Floppy disk ?

Answer: IBM in 1970

2. Who invented Submarine ?

Answer:

John Philip Holland

3. Who invented by Electric Lamp ?

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

4. Who invented Transformer ?

Answer:

Ottó Bláthy

5. Who invented Barometer ?

Answer: Evangelista Torricelli of Italy in 1644

6. Who invented Chemotherapy ?

Answer: Paracelsus of Switzerland

7. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712