Extended family: several generations living and working together on the land.
Nuclear family: father working, mother at home not working, and approximately two children--for middle and upper classes in developed West. Also nuclear family in lower class West and socilalist countries--except that women worked.
Multiple family patterns: no one model everyone must follow to be socially accepted. Examples include: married couples with or oithout children; unmarried couples living together; single parents; divorced parents with children who remarry, making children part of different households; single-person households; people living in groups; gay and lesbian couples; etc.