A census is the procedure of systematically enumerating, and acquiring and recording information about the members of a given population. This term is used mostly in connection with national population and housing censuses; other common censuses include the census of agriculture, and other censuses such as the traditional culture, business, supplies, and traffic censuses. The United Nations defines the essential features of population and housing censuses as "individual enumeration, universality within a defined territory, simultaneity and defined periodicity", and recommends that population censuses be taken at least every ten years. United Nations recommendations also cover census topics to be collected, official definitions, classifications and other useful information to co-ordinate international practices.
