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  Cave paintings are painted drawings on cave walls or ceilings, mainly of prehistoric origin.
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  In recent centuries the tablets have been popularly described and depicted as round-topped rectangles but this has little basis in religious tradition.
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  Smoke signal is one of the oldest form of long distance communication
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  Traditional paper is a “wood” like material primarily used for writing, first invented in ancient China.
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  Ancient writers wrote on a variety of other materials besides papyrus, including pottery, animal hides, wood, and even ancient paper.
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  Printing press is a device for applying pressure to an inked surface resting upon a print medium (such as paper or cloth), thereby transferring the ink.
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  Newspaper is a serial publication containing news about current events, other informative articles about politics, sports, arts, and so on, and advertising.
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  Magazine is a publication, usually a periodical publication, which is printed or electronically published.
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  Photography is the science, art, application and practice of creating durable images by recording light.
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  Morse code is a method of transmitting text information as a series of on-off tones, lights, or clicks that can be directly understood by a skilled listener or observer without special equipment
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  Telegraph is the long-distance transmission of textual or symbolic messages.
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  Typewriter is a mechanical or electromechanical machine for writing characters similar to those produced by printer’s movable type.
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  Telephone 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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  Radio is the technology of using radio waves to carry information, such as sound, by systematically modulating properties of electromagnetic energy waves transmitted through space.
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  Television 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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  Personal computer or PC is a multi-purpose electronic computer whose size, capabilities, and price make it feasible for individual use.
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  Email also known as electronic mail is a method of exchanging messages between people using electronics.
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  Mobile phone is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area.
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  Smart phone is a mobile personal computer with a mobile operating system with features useful for mobile or handheld use.
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  Social media are websites and applications that enable users to create and share content or to participate in social networking.
Personal Insight: We can share ideas, communicate with other people around the world, share our thoughts and feelings, and many more.