Accession number (library science)
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An accession number is a sequential number given to each new book, magazine subscription, or recording as it is entered in the catalog of a library. If an item is removed from the collection, its number is usually not reused for new items. This numbering system is usually in addition to the library classification number (or alphanumeric code) and to the ISBN or International Standard Book Number assigned by publishers.
Accession numbers are also used by an arboretum, botanic garden, greenhouse, or museums to identify objects or plants by the order in which they entered the museum's collection. Typically, the accession number consists of the year acquired and a sequential number separated by a period. In addition, departments or art classifications within the collection or museum may reserve sections of numbers. For example, objects identified by the numbers 11.000 through 11.999 may indicate objects obtained by the museum in 1911; the first 300 numbers may be used to indicate American art, while the next fifty (11.301-350) may be used for African art.
