20th century

== Nature of innovation and change ==
Due to continuing industrialization and expanding trade, many significant changes of the century were, directly or indirectly, economic and technological in nature. Inventions such as the [[light bulb]], the [[automobile]], [[mechanical computer]]s, and the [[telephone]] in the late 19th century, followed by [[supertanker]]s; [[airliner]]s; [[motorway]]s; [[radio communication]] and [[radio broadcasting|broadcasting]]; [[television]]; [[digital computers]]; [[air conditioning]]; [[antibiotics]]; [[nuclear power]]; [[frozen food]]; [[microcomputer]]s; the [[Internet]] and the [[World Wide Web]]; and [[mobile telephone]]s affected people's [[quality of life]] across the developed world. The quantity of goods consumed by the average person expanded massively. Scientific research, engineering professionalization and technological development—much of it motivated by the [[Cold War]] arms race—drove changes in everyday life.