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 To maintain confidentiality, the PUMS files contain no names, addresses, or other information that would permit identification of an individual person or housing unit. Users can manipulate these files to prepare tabulations of their own design. See also public-use microdata area.

Pueblo A type of American Indian reservation; before the 1990 census, the term used for the legal subdivision, or MCD equivalent, of a municipio (the county equivalent) in Puerto Rico. The term barrio-pueblo replaced pueblo for the 1990 census. See also barrio-pueblo.

PUMA See public-use microdata area.

PUMS See public-use microdata samples.

Purchase A type of nonfunctioning MCD found in New Hampshire.

Rancheria (American Indian) A type of American Indian reservation.

Range See public land survey system, township and range system.

Reapportionment The redistribution of seats in the U.S. House of Representatives among the several States on the basis of the most recent decennial census, as required under Article I of the Constitution. See also decennial census, redistricting.

Redistricting The delineation of representational district boundaries, based on the most recent decennial census, for the purpose of electing representatives to a State legislature, the U.S. House of Representatives, or a county or city council. See also decennial census, election district, election precinct, precinct, reapportionment, voting district.

Region (census geographic) Four groupings of States (Northeast, South, Midwest, and West) established by the Census Bureau in 1942 for the presentation of census data. Each region is subdivided into divisions. See also division (census geographic). GlossaryG-41