1. Who invented Laptop ?

Answer:

Adam Osborne in 1981.

2. Who invented Submarine ?

Answer:

John Philip Holland

3. Who invented Vitamin D ?

Answer:

Edward Mellanby discovered Vitamin D while researching a disease called rickets in 1922

4. Who invented Chloroform as anaesthetic ?

Answer: James Simpson of Britain in 1847.

5. Who invented Bakelite ?

Answer: Leo H. Baekeland of Belgium in 1907.

6. Who invented Java Language ?

Answer:

James Gosling

7. Who invented X-ray ?

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