1. Who invented Transistor ?

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

2. Who invented Printing Press ?

Answer:

Johannes Gutenberg

3. Who invented Atomic Bomb ?

Answer: J. Robert Oppenheimer of U.S.A. in 1945

4. Who invented Java Language ?

Answer:

James Gosling

5. Who invented Floppy disk ?

Answer: IBM in 1970

6. Who invented Safety razor ?

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

7. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.