The LTLS Cataloging Center will operate as usual during the Horizon software upgrade on April 7 and 8. However, cataloging staff will not be able to import new bibliographic records into LINC until the upgrade is complete. This means that while items cataloged on April 7 and 8 will be returned via the LTLS Delivery Service as usual, the matching bibliographic records that would normally be imported into LINC on April 7 and 8 will not be accessible until Monday April 11. WorldCat Cataloging Partners (formerly PrompCat) records will also be affected.