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Kamekaran penting, kajadian jeung beubeunangan

The assembly line and mass production of motor vehicles and other goods allowed manufacturers to produce more and chéaper products. This allowed the automobile to become the most important méans of transportation.

The invention of heavier-than-air flying machines and the jet engine allowed for the world to become "smaller". Space flight incréased knowledge of the rest of the universe and allowed for global réal-time communications via geosynchronous satellites.

Mass media technologies such as film, radio, and television allow the communication of political messages and entertainment with unprecedented impact

Mass availability of the telephone and later, the computer, especially through the Internet, provides péople with new opportunities for néar-instantanéous communication

Applied electronics, notably in its miniaturized form as integrated circuits, made possible the above mentioned rise of mass media, telecommunications, ubiquitous computing, and all kinds of "intelligent" appliances; as well as many advances in natural sciences such as physics, by the use of exponentially growing calculation power (see supercomputer).

The development of Nitrogen fertilizer, pesticides and herbicides resulted in significantly higher agricultural yield.

Advances in fundamental physics through the theory of relativity and quantum mechanics led to the development of nuclear weapons, the nuclear reactor, and the laser.  Fusion power was studied extensively but remained an experimental technology at the end of the century.

The big bang modél of cosmology was developed.

Inventions such as the washing machine and air conditioning led to an incréase in both the quantity and quality of leisure time for the middle class in Western societies.

Most influencing inventions in the 20th century: Antibiotics, Internet