Learn about the U.S. Census Bureau problem that led to Hollerith's development of machines that tabulated data from Jacquard's punched cards.

Learn how the punch-card tabulation machine system was invented, and how it revolutionized statistical computation.

Meet the American inventor of a tabulating machine that was an important precursor of the electronic computer.

Explore the life of Herman Hollerith, the inventor of the punch card machine in 1890. Includes links and biographical facts.

Study a brief profile of Herman Hollerith, the inventor of the tabulating machine whose company eventually became IBM.

Meet the man who developed punched card technology, a giant step towards the development of the modern electronic computer.

Profile of Hollerith includes references for further reading, a map of his Buffalo birthplace, a portrait, and an image of his machine.

In-depth article looks at Hollerith's first counting machine design, system modifications, field testing of the machine, and the Census problem.