Time period which we have written record but they are few and still cannot read
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lThe history of writing traces the development of expressing language by letters or other marks[1] and also the studies and descriptions of these developments.
In the history of how writing systems have evolved in different human civilizations, more complete writing systems were preceded by proto-writing, systems of ideographic or early mnemonic symbols (symbols or letters that make remembering them easier). True writing, in which the content of a linguistic utterance is encoded so that another reader can reconstruct, with a fair degree of accuracy, the exact utterance written down, is a later development. It is distinguished from proto-writing, which typically avoids encoding grammatical words and affixes, making it more difficult or impossible to reconstruct the exact meaning intended by the writer unless a great deal of context is already known in advance. One of the earliest forms of written expression is cuneiform.[2]
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