Similar to 国際十進分類法

15th Waffen Grenadier Division of the SS (1st Latvian)

Martin AM Mauler

AMX International AMX

Tupolev ANT-20

Apache Wicket

Axiom (computer algebra system)

North American XB-70 Valkyrie

50 (number)

Index term

Library of Congress Subject Headings

Library classification

JEL classification code

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

International Standard Name Identifier

Colon classification

Knowledge organization

Dewey Decimal Classification