call number - A code displayed on the label affixed to the lower spine of each book or videocassette in a library collection, and in the record which represents the item in the library catalog. The call number is assigned by the catalog librarian to uniquely identify the work, indicate its subject classification, and give its location on the shelf relative to other items of similar classification. See also: notation, Cutter number, and author mark.
Most research libraries and academic libraries in the United States use Library of Congress call numbers which begin with letters of the Latin alphabet (example: PN 2035.H336 1991). Most school libraries and public libraries in the United States use Dewey Decimal call numbers which begin with arabic numerals (example: 996.902 H75). ;
дс тдрлими цюлютдажкию дроемжки аиакиохдйис лидр
http://www.wcsu.ctstateu.edu/library/odlis.html#callnumber;