Specific systems
(Domain specific systems are listed under "Specific
Domains")
BBK. See: Soviet Bibliothecal-Bibliographic Classification (BBK/LBC)
BSO (Broad System of Ordering)
Chinese Library Classification (CLC)
Dewey Decimal Classification (DDC)
DK5 (Danish Decimal Classification)
Hermitage Museum, Digital Collection
Information Coding Classification (ICC)
Integrative level classification (ILC)
Kaiser's "systematic indexing"
Library of Congress Classification (LCC)
Library of Congress Subject Headings (LCSH).
NEPHIS (Nested Phrase Indexing System)
The OKAPI information retrieval system (Core Concepts in LIS)
PRECIS (Preserved Context Index System)
SAB (Klassifikationssystem för svenska bibliotek; Classification system for Swedish Libraries)
SAP-Indexing (Core Concepts in LIS)
Sears' list of subject headings
Soviet Bibliothecal-Bibliographic Classification (BBK/LBC)
SRC (Subject-field Reference Code). See BSO
UASK (Royal Library in Copenhagen)
UDC (Universal Decimal Classification)