Code.
In most numeric data files, answers to questions are recorded with
numbers rather than text and often even numeric answers are recorded with
numbers other than the actual response. The numbers used in the data file
are called "codes." Thus, for instance, when a respondent identifies herself
as a member of a particular religion, a "code" of 1 might be used for
Catholic, a 2 for Jewish, etc. Likewise, a person's age of 18 might be coded
as a 2 indicating "18 or over." The codes that are used and their
correspondence to the actual responses are listed in a
codebook .
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