Famous inventions in Science is important topic for all competitive exams like SSC, Banking, Railways and State Government exams.
| X-Rays | Wilhelm Conrad Rontgen | 1895 |
| Radio / Wireless Telegraphy | Guglielmo Marconi | 1894 |
| Dynamite | Alfred Nobel | 1867 |
| Barometer | Evangelista Torricelli | 1643 |
| Electric Battery | Alessandro Volta | 1800 |
| Electric Bulb | Thomas Alva Edison | 1879 |
| Telephone | Alexander Graham Bell | 1876 |
| Radioactivity | Henri Becquerel / Marie & Pierre Curie | |
| Raman Effect | C.V. Raman | 1928 |
| Penicillin | Alexander Fleming | 1928 |
| Polio Vaccine (Injectable) | Jonas Salk | 1955 |
| Vaccination (Smallpox) | Edward Jenner | 1796 |
| Insulin | Frederick Banting & Charles Best | 1921–1923 |
| Circulation of Blood | William Harvey | 1628 |
| Blood Groups (ABO System) | Karl Landsteiner | 1900 |
| Pasteurization | Louis Pasteur | |
| Periodic Table | Dmitri Mendeleev | 1869 |
| Aspirin | Felix Hoffmann | 1899 |
| Oxygen | Joseph Priestley / Carl Wilhelm Scheele | 1774 |
| Hydrogen | Henry Cavendish | 1766 |
| Vulcanized Rubber | Charles Goodyear | 1841 |
| Electron | J.J. Thomson | 1897 |
| Proton / Nucleus | Ernest Rutherford | 1911 |
| Neutron | Neutron | 1932 |
| Computer (Mechanical) | Charles Babbage | |
| World Wide Web (WWW) | Tim Berners-Lee | 1989 |
| Transistor | John Bardeen, Walter Brattain, William Shockley | 1947–1948 |
| Air Conditioner | Willis Carrier | 1902 |
| Printing Press | Johannes Gutenberg | 1440 |
| Aeroplane | Wright Brothers | 1903 |
| Mobile Phone | Martin Cooper | 1973 |
| Steam Engine | James Watt | 1781 |
| Diesel Engine | Rudolf Diesel | 1892 |
