Similar to ぶどう・ワイン十進分類法

Library classification

BIBSYS

JEL classification codes

ORCID

ResearcherID

Scopus

Système universitaire de documentation

Library of Congress Control Number

Library of Congress Classification

Library of Congress Classification:Class K -- Law

Library of Congress Classification:Class Q -- Science

Universal Decimal Classification

International Standard Name Identifier

Colon classification

Knowledge organization

Dewey Decimal Classification

Integrated Authority File

Controlled vocabulary

Nippon Decimal Classification

Faceted classification

National Library of Medicine classification

Metadata