Salamis Tablet
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The Salamis Tablet is a marble counting board (an early counting device) dating from around 300 BC, that was discovered on the island of Salamis in 1846. A precursor to the abacus, it is thought that it represents an ancient Greek means of performing mathematical calculations common in the ancient world. Pebbles (Latin: calculi) were placed at various locations and could be moved as calculations were performed. The marble tablet itself has dimensions of approximately 150 × 75 × 4.5 cm.[1]
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/f/f2/Salaminische_Tafel_Salamis_Tablet_nach_Wilhelm_Kubitschek_Numismatische_Zeitschrift_Bd_31_Wien_1899_p._394_ff.jpg)