🌐EnglishEnglishPortuguês中文EntityQ3302817· pop 6· linked from 64 articlesRoman abacusBase-10 portable abacusAvailable in 6 languagesPortuguêsBurmeseCatalanGreekUkrainianvia Wikidata sitelinks · CC0Connectionsslide ruleEntityRoman EmpireEntityCategoriesAbacusAncient Roman mathematicsAncient Roman technology