Kha̍h-phìn chǹg-khang-kiCredit: U.S. National Archives and Records Administration (NARA)

Chi̍t-ê tng teh chhau-chok chǹg-khang kha̍h khì-kū Hollerith pantograph punch ê lâng. Tong-sî sī teh chhù-lí 1940 nî Bí-kok Phó͘-cha (chiàu îⁿ-tháng téng-bīn ê chu-liāu keh-sek [1]) ê chu-liāu.