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| | | | Communication |
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| c. 3100 BC |
| | | Writing is developed, at Sumer, as cuneiform script on clay tablets | |
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| c. 3000 BC |
| | | An easily portable writing surface is developed, from the papyrus plant of the Nile | |
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| c. 1050 |
| | | The rulers of Baghdad harness homing pigeons as postmen. | |
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| 1653 |
| | | The English admiral Robert Blake introduces a system of signalling at sea by means of flags | |
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| 1838 |
| | | US inventor Samuel Morse gives the first public demonstration, in Philadelphia, of his electric telegraph | |
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| 1840 |
| | | Rowland Hill introduces in Britain the world's first postage stamps - the Penny Black and Two Pence Blue | |
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| 1844 |
| | | Samuel Morse and his assistant Alfred Vail complete the first telegraph line, between New York and Baltimore | |
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| 1858 |
| | | US entrepreneur Cyrus W. Field succeeds in laying a telegraph cable across the Atlantic, but it fails after only a month | |
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| 1870 |
| | | Adelaide and Darwin are linked across the entire Australian continent by the Overland Telegraph Line | |
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| 1871 |
| | | Italian US immigrant Antonio Meucci files a patent in New York for the invention of the telephone | |
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