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- catalog abstract "May contain pamphlets, press accounts, and ephemera.".
- catalog date " ".
- catalog description "May contain pamphlets, press accounts, and ephemera.".
- catalog description "The Babbage calculator was invented by Charles Babbage ca.1834. The machine was also known as the Difference Engine.".
- catalog issued " ".
- catalog language "eng".
- catalog subject "Babbage, Charles, 1791-1871.".
- catalog subject "Calculators Design and construction.".
- catalog subject "Calculators.".
- catalog title "General information about the Babbage calculator.".
- catalog type "collection".