Classification number from a scheme not covered by one of the other number fields. The field should not be used for classification numbers assigned from a source for which a subfield $2 source of number code would not be assigned.
084 | ##$a016$a014$a018$a122$2frbnpnav | ||||||||
084 | ##$aKB112.554$bU62 1980$2laclaw | ||||||||
084 | ##$a330$a380$a650$a670$qDE-101$2sdnb | ||||||||
084 | ##$a125$a631$qDE-600$2zdbs | ||||||||
084 | ##$a8501(043)$2rueskl | ||||||||
084 | ##$aCA2 PQ C07 81P52$2cacodoc |