The 20th century was a time of great progress and change. One of the most important changes was the development of new technologies that changed the way people lived and worked.
The 20th century saw the development of many new technologies, including the automobile, airplane, radio, television, computer, and internet. These technologies revolutionized transportation, communication, and entertainment. They also made it possible for people to work more efficiently and to live better lives.
The 20th century was also a time of many new art movements.
