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also known as parietal art, are painted drawings on cave walls or ceilings, mainly of prehistoric origin, beginning roughly 40,000 years ago (around 38,000 BCE) in Eurasia.
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is a material similar to thick paper that was used in ancient times as a writing surface.
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were used as a writing medium, especially for writing in cuneiform, throughout the Bronze Age and well into the Iron Age.
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were carved on stone or metal and presented in message boards in public places like the Roman Forum beginning about 130 BCE.
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is a periodical publication containing written information about current events.
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refers to social attributes and forms of political and cultural organization that were prevalent before the advent of the Industrial Revolution, which occurred from 1750 to 1850. Pre-industrial is a time before there were machines and tools to help perform tasks en masse.
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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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is a mechanical or electromechanical machine for writing characters similar to those produced by printer's movable type.
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is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly.
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also called film or movie, series of still photographs on film, projected in rapid succession onto a screen by means of light.
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the electronic age began when electronic equipment, including computers came into use.
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is a telecommunication medium used for transmitting moving images in monochrome (black and white), or in color, and in two or three dimensions and sound
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was the first practical general purpose stored program electronic computer.
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also known later as the Apple I, or Apple-1, is a desktop computer released by the Apple Computer Company (now Apple Inc.) in 1976. It was designed and hand-built by Steve Wozniak.
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is a historic period in the 21st century characterized by the rapid shift from traditional industry that the Industrial Revolution brought through industrialization, to an economy based on information technology.
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is a portable personal computer, typically with a mobile operating system and LCD touchscreen display processing circuitry, and a rechargeable battery in a single thin, flat package.
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is a series of graphical web browsers developed by Microsoft and included in the Microsoft Windows line of operating systems, starting in 1995.
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is a telecommunications application software product that specializes in providing video chat and voice calls between computers, tablets, mobile devices, the Xbox One console, and smartwatches via the Internet and to regular telephones.
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is an American online social media and social networking service company based in Menlo Park, California.
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is an American video-sharing website headquartered in San Bruno, California. The service was created by three former PayPal employees—Chad Hurley, Steve Chen, and Jawed Karim—in February 2005.
