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Cave drawings Around 30,000 bc ancient civilations painted on cave walls for both ceremonial purposes and to communicate with other cave dwellers.
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Around 9,000 bc ancient civilizations developed pictures that represent an object or an idea.
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writing
In 1700 bc the Egyptians developed the early system of writing -
In 1000 bc the Phonecians developed a 22 character alphabet that would later be evolved into the english alphabet.
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In 1849, the first basic telephone was invented by Antonio Meucci. The U.S. patent was taken by Alexander Graham Bell in 1876.
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In 1939 Hewleett-Packard created the first computer the 200A Audio Oscilator.
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Skype
In 2003 a new technology , Skype, was invented to let users communicate through the internet
