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File:Vintage National Semiconductor Model 200R Electronic Pocket Calculator On A National Semiconductor Power Adaptor Stand (Model NS 200PS), Both Made In Taiwan, Circa 1977 (15805729567).jpg - Wikimedia Commons
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Desktop Calculator with Check & Correct Function (NS-317) - China Electronic Calculator, Desktop Calculator | Made-in-China.com
Scientific Calculator - 240 Functions - 2 Line Display - 12 Digits - MGC-03 - NS: Buy Online at Best Prices in Pakistan | Daraz.pk