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Of course, his performance and explanation were extraordinary but the lack of slides, and due to background noise, made it a little bit difficult to understandjsdhhjjjjjjjjjjjdkaydvvhhhhhhhhhha the jdbd d jsb sh shshshshshsns sahhahb ahbsbbddaabhjdjdjdjdjjdjjdabshhshsjjsyhhfThe history of communication itself can be traced back since the origin of speech circa 500, 000 BCE. The use of technology in communication may be considered since the first use of symbols about 30, 000 years BCE. Among the symbols used, there are cave paintings, petroglyphs, pictograms and ideograms.