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Abak (tudi abakus) je enostavno mehansko računalo. Beseda izhaja iz perzijske besede za gladko peskovno površino. Abak so verjetno iznašli Babilonci okrog leta 2400 pr. n. št.
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Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.
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