File:Tally marks counting visitors.jpg

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English: Unary numerals: Visitors being counted manually by using an unary numral system. Note that different persons had made the tally marks, and that two of the groups of tally marks actually are wrong.
Svenska: Unära talsystemet: Manuellt förd besökarräkning genom att gruppera lodräta streck i grupper om fyra med det femte strecket diagonalt över gruppen. Notera att flera olika personer satt strecken, samt att två av grupperna inte har korrekt antal streck. Kolumnen längst till vänster innehåller nerkortade datum skrivna med arabiska siffror.
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Author Gunnar Creutz

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current08:20, 3 July 2010Thumbnail for version as of 08:20, 3 July 20101,076 × 590 (330 KB)Achird (talk | contribs){{Information |Description={{en|1=Unary numerals: Visitors being counted manually by using an unary numral system. Note that different persons had made the tally marks, and that two of the groups of tally marks actually are wrong. }} {{sv|1=Unära talsyst

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