The Hollerith electric tabulating machine
The Hollerith electric tabulating machine being used for the 1890 U.S. A. Census.
Woman operating the card puncher
This is a card puncher, an integral part of the tabulation system used by the United States Census Bureau to compile the thousands of facts gathered by the Bureau. Holes are punched in the card according to a prearranged code transferring the facts from the census questionaire into statistics.