001

Control number uniquely identifying the record

005

Date and time that the record was last modified

008

Fixed fields

010

Library of Congress control number

015

National Bibliographic number

035

System control number

040

Cataloging source

050

Library of Congress classification

082

Dewey classification

100

Main entry—personal name

260

Imprint: place of publication, publisher, date

300

Physical description

500

General note

504

Bibliography note

650

Subject entry

650

Subject entry

906

Tags in the 900 range are reserved for local use, and are used by vendors, systems, or individual libraries to exchange additional data

985

991