- MARC Standards
- Library of Congress Network Development and MARC Standards Office. Includes: general information, MARC documentation, MARC Advisory Committee, MARC SGML, records and systems, and software and utilities. - Bibliographic Formats and Standards - An exhaustive guide to the MARC standard from OCLC.
- CAN/MARC home page - "The Canadian MARC Communication Formats serve as the common standard for the exchange of machine-readable authority, bibliographic, classification, and holdings data in Canada." Includes news and announcements, CAN/MARC documentation, MARC Records Distribution Service (MRDS).
- Cataloging Cheat Sheet - A fast guide to cataloguing an item in MARC format. Provides a concise guide to abbreviations and field tags used. Really only meaningful to someone fairly familiar with MARC, but a useful cheat sheet.
- MARC 21 - MARC formats for the 21st century - "MARC 21 is the result of the activity undertaken to align CAN/MARC and USMARC. It represents the continuation of the CAN/MARC and USMARC formats in a single edition with a new name."
- MARC Records, Systems, and Tools - Provides links to MARC vendors who market specialized tools that provide enhanced usability to MARC 21 records and systems. Includes both commercial and free tools.
- MARC.pm : Machine Readable Cataloging Perl Module - A free Perl module for processing MARC records.
- MarcEdit - MarcEdit is a free windows based MARC editing tool, that provides methods for converting MARC to text, Text to MARC, MARC to XML and MARC to Dublin Core.
- Tag of the Month - A guide to most MARC cataloging tags with examples and text explaining their usage. Useful to persons needing plain descriptions of MARC fields. From Follett Software Company.
- UNIMARC - Universal Bibliographic Control and International MARC Core Programme (UBCIM). International Federation of Library Associations and Institutions.
- XML and MARC - Stanford University's Lane Medical Library details its experiment in using XML instead of MARC to organize its catalog data.
