This document provides an overview of cataloging and metadata. It discusses how cataloging organizes materials and information to facilitate access. Cataloging data about library materials is stored in various systems and formats, including MARC records and databases. Key aspects covered include the different types of bibliographic records, holdings records, and item records; authority control; and standards and tools used in cataloging like AACR2, RDA, LC call numbers, and OCLC. The document also breaks down components of a MARC bibliographic record like different data fields.