1. Who invented Floppy disk ?

Answer: IBM in 1970

2. Who invented HIV ?

Answer:

3. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

4. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

5. Who invented Laser ?

Answer:

Charles H. Townes

6. Who invented Radiocarbon ?

Answer:

Willard Libby

7. Who invented X-ray ?

Answer: W.K. Roentgen of Germany in 1895.