Terms of use
Review every shelfmark before using it.
ShelfSignal is a free, independent planning aid. It provides a conservative starting point and local comparison, not an official classification, cataloging decision, professional service, or guarantee.
Your responsibility
Use only data you are authorized to process. Confirm every result against the applicable schedule, your institution’s policy, and the existing shelflist before adding it to a catalog or printing labels.
Limits
The tool is provided as available without warranties of accuracy, completeness, fitness for a particular purpose, or non-infringement. Do not rely on it for irreversible collection changes without qualified review.
Independence
ShelfSignal is not affiliated with, endorsed by, or certified by the Library of Congress, OCLC, or any library system vendor. It does not include proprietary Cutter tables or classification schedules.