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Curta
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== Models == The Type I Curta has eight digits for data entry (known as "setting sliders"), a six-digit revolution counter, and an eleven-digit result counter. According to the advertising literature, it weighs only {{convert|8|oz}}. Serial number 70154, produced in 1969, weighs {{convert|245|g}}. The larger Type II Curta, introduced in 1954, has eleven digits for data entry, an eight-digit revolution counter, and a fifteen-digit result counter.<ref>{{cite web |last1=Toth |first1=Viktor |title=Programmable Calculators - Curta Type II |url=https://www.rskey.org/CMS/exhibit-hall/?view=article&id=120 |website=www.rskey.org |access-date=7 June 2024}}</ref>
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