List fields associate pre-defined <em>keys</em> (or value codes) with <em>labels</em> that the user sees. For example, you might define a list field that shows the user the names of several locations, while behind the scenes a location code is stored in the database. Each list field type corresponds to one type of stored key. For example, a <em>List (integer)</em> field stores integers, while the <em>List (text)</em> field stores text strings. Once you have chosen the field type, the main setting for a list field is the <em>Allowed values</em> list, which associates the keys with the labels.