The Cataloging in Publication Program creates bibliographic records for forthcoming books most likely to be widely acquired by U.S. libraries. The bibliographic record (also known as CIP data) is sent to the publisher and printed on the verso of the title page. A machine-readable version of the record is also distributed to libraries, book dealers, and bibliographic networks worldwide via the Library's Cataloging Distribution Service (CDS).
The Preassigned Control Number (PCN) Program assigns a Library of Congress Control Number (LCCN) to titles most likely to be acquired by the Library of Congress as well as some other categories of books. The publisher prints the LCCN in the book and thereby facilitates cataloging and other book processing activities for libraries and book sellers who obtain copies of the book. An initial bibliographic record is also created for these works when the number is assigned. This record is not distributed and is not printed in the book. The CIP Program and PCN Program are mutually exclusive. Titles processed in one program are not processed in the other program.