Bay of Pigs. Kennedy didnât wait long for the first confrontation of his presidency. Only weeks after he took office he was told of a secret CIA plan to send an army of Cuban exiles to overthrow Fidel Castro and rid the western hemisphere of its first Communist regime.
An enumeration district, as used by the Bureau of the Census, was an area that could be covered by a single enumerator (census taker) in one census period. Enumeration districts varied in size from several city blocks in densely populated urban areas to an entire county in sparsely populated rural areas. Enumeration district maps show the boundaries and the numbers of the census enumeration districts, which were established to help administer and control data collection.
In this case an enumeration may be defined as follows: 1  As a bijective mapping from S to an initial segment of the natural numbers. 2  This definition is especially suitable to combinatorial questions and finite sets; then the initial segment is {1,2,..., n } for some n which is the cardinality of S.n some contexts, such as enumerative combinatorics, the term enumeration is used more in the sense of counting â with emphasis on determination of the number of elements that a set contains, rather than the production of an explicit listing of those elements.