"Sh.Col." (pronounced shuh-CALL) is short for "Shakespeare Collection" and is the abbreviation added to call numbers for Shakespeare editions preserved in the vault. Shakespeare editions in the open stacks have ordinary LC Classification call numbers. Generally speaking, closed-stacks Shakespeare editions acquired before 2000 have the suffix "Sh.Col." after an LC-style call number. Closed-stacks Shakespeare editions acquired after 2000 have "Sh.Col." as a prefix to an accession-number-based call number.