Classify

ISBN

An ISBN is a unique number assigned to an item by its publisher. Each ISBN is a 10 or 13 digit number. Thirteen-digit ISBNs must begin with either 978 or 979.

Enter ISBNs with our without hyphens.

For example;

• 978-1-886101-11-1
• 9781886101111
• 1-886101-11-6
• 1886101116

OCLC #

OCLC assigns a unique number to each bibliographic record input into WorldCat. OCLC numbers vary in length from 1 to 9 digits. You can enter an OCLC number with or without leading zeros. For example:

• 009111188
• 9111188
• 35796477
• 237005966

UPC

The Universal Product Code (UPC) is a barcode symbol that is used to track trade items in stores (e.g., audio and video products). The UPC appears as a barcode symbol with 12 digits printed below it. Hyphens or spaces usually separate the elements of the number on the item. The code has three basic parts:

1. The first digit is the Number System Character (NSC) which appears on the left side of the symbol outside of the bars.
2. The next ten digits encoded in the symbol are below the bars.
3. The twelfth digit is a check digit and usually appears at the bottom right of the symbol.

Enter all digits found on the item (e.g., 008817006925).

ISSN

An ISSN is a standardized international code which allows the identification of a serial publication. An ISSN consists of eight digits in two groups of four, separated by a hyphen. You can enter an ISSN with or without a hyphen or leading zeros as shown below:

• 7369956
• 07369956
• 0736-9956

FAST is a controlled vocabulary based on the Library of Congress Subject Headings (LCSH). FAST headings are categorized into seven subject facets and one form/genre facet: Topic, Place, Time, Event, Person, Corporate body, Title of work, and Form/Genre. FAST headings provide additional subject information about a work and enable you to search the Classify database by subject.

To learn more about FAST, please visit the FAST Project Page on OCLC.org