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http://dictionary.reference.com/browse/pictogramThe cave drawings were created in the upper Palaeolithic period (40,000 to 10,000 BC)
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http://dictionary.reference.com/browse/pictogramA Pictogram is a symbol of the pictoral graphic system and was created in 9000 BC
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http://www.petroglyphs.us/Petroglyphs are rock carvings (rock paintings are called pictographs) made by pecking directly on the rock surface using a stone chisel and a hammerstone. and was created in 10,000 BC
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http://site.xavier.edu/polt/typewriters/tw-history.htmlThe concept of a typewriter dates back at least to 1714 by Englishmen Henry Mill.
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http://www.computerhope.com/issues/ch000984.htmAnalytical Engine, a device conceived and designed by British mathematician Charles Babbage between 1833 and 1871.
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http://www.shoretelsky.com/history-of-telegraph-in-communications/Developed in the 1830s and 1840s by Samuel Morse (1791-1872) and other inventors, the telegraph revolutionized long-distance communication.
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http://dictionary.reference.com/browse/pictogramis a graphic symbol that represents an idea or concept.
it was developed in China during the T’ang dynasty (618–907)
