Online cataloging resources
CCS
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General
Cataloger's Desktop (subscription only)
The Library Corporation's Catalogers reference shelf
ODLIS: Online Dictionary for Library and Information Science
Cooperative Cataloging Rules: Cataloging rules links
Cooperative Cataloging Rules: Record formats links
Core Competencies for Cataloging and Metadata Professional Librarians (ALCTS) 2017
General RDA
RDA training videos from ALCTS
RDA training documents and recorded webinars from LC
PCC Guidelines for the Application of Relationship Designators in Bibliographic records
FRBR-Library Reference Model (LRM)
OCLC
OCLC Bibliographic Formats & Standards
WorldCat and Authority Record Quality Control Request form
OCLC-MARC format specifications
Jay Weitz's Cataloging Defensively on OCLC presentations
ISBNs
LC Subject Headings and Authorities
LC Linked Data Service (Authority records, vocabularies, MARC code lists, etc.)
VIAF Virtual International Authority File
LC Subject heading proposal form
Lists of new Library of Congress Subject Headings
Genre/Form Headings at the Library of Congress
Library of Congress Demographic Group Terms
MARC
Dewey Decimal Classification
Foreign language cataloging
Foreign Language Online Dictionaries and Free Translation links
National Library of Russia's online catalogues
IBFLIBNET (India's national union catalogue)
Japan's national Diet library catalog
Japan's National Institute of Informatics online union catalog
NUKAT (Poland's national union catalog)
KOLIS-NET (Korean union catalog)
McCune-Reischauer system for Korean transliteration
Korean McCune-Reischauer Romanization Dictionary (for both words and phrases)
Unicode Standard for character encoding
Character encoding in MARC21 records
A/V cataloging
Music
Music Library Association Best Practices (for RDA, LCGFT, and LCMPT)
Best Practices for Using LCGFT for Music Resources (2016)
Supplements to Best Practices for Music Cataloging Using RDA and MARC21 (2017)
Best Practices for Using LCMPT (MARC Field 382) (2017)
Types of Composition for Use in Authorized Access Points: A Manual for Use with RDA
Videos
OLAC Best Practices for cataloging DVD-Video and Blu-ray Discs (2015)
OLAC Best Practices for Cataloging Streaming Media (2015)
Maps
Playaways
OLAC Guide to Cataloging Playaway Devices (2008)
OLAC Playaways and RDA (Partial update of the previous document)
Serials
CONSER Cataloging Manual (CCM)