A. Census Definitions
The following is an excellent source of definitions and explanations of social, economic and housing characteristics and general terms used by the U.S. Census 2000: http://www.census.gov/prod/cen2000/phc-2-a.pdf
Labor Force. All people classified in the civilian labor force (i.e., employed and unemployed people), plus members of the U.S. Armed Forces (on active duty).
Group Quarters. Includes all people not living in households. Includes institutionalized population and non-institutionalized population (such as college dormitories, military quarters, and group homes, and the staff residing at these quarters.
Household. A household includes all of the people who occupy a housing unit. A housing unit is a house, an apartment, a mobile home, a group of rooms, or a single room occupied as separate living quarters. The occupants may be a single family, one person living alone, two or more families living together, or an other group of related or unrelated people who share living quarters.
Spouse (husband/wife) A person married to and living with a householder. People in formal marriages, as well as people in common law marriages, are included.
Child. A son or daughter by birth, a stepchild, or an adopted child of the householder, regardless of the child’s age or marital status. The category excludes sons-in-law, daughters-in-law, and foster children.
Own child. A never-married child under 18 who is son or daughter of the householder by birth, marriage (a stepchild), or adoption.
Family Type. A family includes a householder and one or more other people living in the same household who are related to the householder by birth, marriage, or adoption. Not all households contain families, since a household may be comprised of a group of unrelated people or of one person living alone.