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Herman Holterarendas välja tabelimismasina, mis kasutas õpetamiseks perfokaarte. Holteri aparaati kasutati inimeste loendamiseks Ameerika Ühendriikide rahvaloenduse jaoks. (1 jan 1906 ano – 1 abr 1906 ano)

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1 jan 1906 ano
1 abr 1906 ano
~ 3 months
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