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The Stone Age was a broad prehistoric period during which stone was widely used to make implements with an edge, a point, or a percussion surface.
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The Iron Age is the final epoch of the three-age division of the prehistory and protohistory of humanity.
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The Bronze Age is a historical period characterized by the use of bronze, and in some areas proto-writing, and other early features of urban civilization.
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Agriculture is the science and art of cultivating plants and livestock. Agriculture was the key development in the rise of sedentary human civilization, whereby farming of domesticated species created food surpluses that enabled people to live in cities.
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The Industrial Age is a period of history that encompasses the changes in economic and social organization that began around 1760 in Great Britain and later in other countries, characterized chiefly by the replacement of hand tools with power-driven machines such as the power loom and the steam engine, and by the concentration of industry in large establishments.
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The Information Age also known as the Computer Age, Digital Age, or New Media Age is a historic period beginning in the 20th century and characterized by the rapid shift from traditional industry that the Industrial Revolution brought through industrialization to an economy primarily based upon information technology.
