1890 United States Census
The data was tabulated by machine for the first time. Herman Hollerith invented this way of tabulating data. This technology made the time to tabulate the census change from eight years for the 1880 census to one year for the 1890 census.
- "Population and Area (Historical Censuses)" (PDF). United States Census Bureau. Archived (PDF) from the original on June 24, 2008. Retrieved June 20, 2008.
- Dippie, Brian W. (1982). The Vanishing American: White Attitudes and U.S. Indian Policy. Middleton, CT: Wesleyan University Press. p. ??. ISBN 0-8195-5056-6.
- Porter, Robert; Gannett, Henry; Hunt, William (1895). "Progress of the Nation", in "Report on Population of the United States at the Eleventh Census: 1890, Part 1". Bureau of the Census. pp. xviii–xxxiv.