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  DSC00967a.jpg - The Olivetti Logos 250 is a 4 function electronic printing calculator from 1971 designed by Mario Bellini. Multiplicaton and division are made in RPN (Reverse Polish Notation) on the blue keys. On this picture, there is no paper in the printer.  
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The Olivetti Logos 250 is a 4 function electronic printing calculator from 1971 designed by Mario Bellini. Multiplicaton and division are made in RPN (Reverse Polish Notation) on the blue keys. On this picture, there is no paper in the printer. Download
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