- Biography of Herman Hollerith (1860-1929) ...www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Hollerith.html
- During the 1880s, the American inventor Herman Hollerith had the idea of using Jacquard's punched cards to represent the data from the American census, and to then read and collate this data using an automatic machine.www.maxmon.com/1890ad.htm
- Fascinating facts about Herman Hollerith inventor of an early computer, the punch card machine in 1890.www.ideafinder.com/history/inventors/hollerith.htm
