- japönsk reiknigrind (soroban)
- kínversk reiknigrind (suan-pan)
- reikniaðferð (calculating method)
- reikniaðgerð (algebraic operation, law of composition, operation)
- reikniborð (abacus)
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- reiknibretti (abacus)
- reiknigrind (abacus, calculating frame, counting frame)
- reiknihending (statistic)
- reiknikúla (bead, counter)
- reiknimeistari (arithmetician, calculator)
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- reiknimyndafræði (nomography)
- reiknimynd (alignment chart, map, nomogram)
- reikniregla (calculating rule, computing rule, rule of arithmetic)
- reiknirit (algorithm)
- reiknirits- (algorithmic)
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- reikniskekkja (computational error)
- reiknistokkur (slide rule)
- reiknivél (calculator, computer, computing machine)
- reiknivilla (miscalculation)
- reiknivísi (calculus, differential and integral calculus)
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