Local call numbers are shelf addresses that an individual library creates according to its own rules and for its own use.
Many libraries use local call numbers to categorize material that is unique to their collection. In-house training is provided for shelving items with local call numbers.
Reserve collections are an example of a collection that uses local call numbers.
Reserve collections exist to ensure access to high demand materials for student use. The heavy use of items in this collection is accommodated through very short loan periods and, sometimes, the requirement that materials be used in the library. Each of the university's seven campus libraries maintains a reserve collection.
Each library location uses its own local call number system.