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Hollerith c. 1888
Hollerith c. 1888
Replica of Hollerith tabulating machine with sorting box, circa 1890. The "sorting box" was an adjunct to, and controlled by, the tabulator. The "sort
Replica of Hollerith tabulating machine with sorting box, circa 1890. The "sorting box" was an adjunct to, and controlled by, the tabulator. The "sorter", an independent machine, was a later development.
Hollerith punched card
Hollerith punched card
Hollerith's grave at Oak Hill Cemetery in Georgetown in Washington, D.C.
Hollerith's grave at Oak Hill Cemetery in Georgetown in Washington, D.C.
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Hollerith 1890 tabulating machine with sorting box.
Hollerith 1890 tabulating machine with sorting box.
Hollerith punched card
Hollerith punched card
IBM Type 285 tabulators in use at U.S. Social Security Administration circa 1936
IBM Type 285 tabulators in use at U.S. Social Security Administration circa 1936
Early IBM D11 tabulating machine, with covers removed
Early IBM D11 tabulating machine, with covers removed