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...The sage encyclopedia of human communication sciences and disorders writing systems contributors alfredo ardila edited by jack s damico martin j ball book title chapter pub date access may publishing company publications inc city thousand oaks print isbn online doi http dx org n pages all rights reserved this pdf has been generated from knowledge please note that pagination version will vary reference represents an extension oral language it is a relatively recent invention in history only was created around bce not single but rather development took long time advancing through different steps complexity although began several millennia ago yet extended to people significant proportion population cannot write continued developing consequently changes strategies currently are observed par ticularly associated with progressively increasing use computers other electronic devices such as cellular phones defined united nations literacy means person can understanding both read short simple s...