1. Who invented HIV ?

Answer:

2. Who invented Floppy disk ?

Answer: IBM in 1970

3. Who invented Ball-Point Pen ?

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

4. Who invented Transistor ?

Answer: Bardeen, Shockley & Britain of U.S.A. in 1948

5. Who invented Dynamo ?

Answer:

Hypolite Pixii of France in 1832

6. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805

7. Who invented Circulation of blood ?

Answer: William Harvey of Britain in 1628