Inventions have changed people's ways of doing things. From penicillin to the computer, discoveries and inventions have made the world a much different place from the year 1900 to the year 2000. The twentieth century saw rapid improvement in the condition of humanity as a result of medical, material, and social progress. Even more significant were the automobile and the airplane, electrification, and the internet, all of which shaped the century and changed the world forever. …
