This document provides an introduction and overview of Resource Description and Access (RDA), the new cataloging standard that replaces Anglo-American Cataloguing Rules (AACR). RDA is designed for the digital age and is based on Functional Requirements for Bibliographic Records (FRBR) and Functional Requirements for Authority Data (FRAD). RDA provides more flexibility and is compatible with current metadata standards and encoding formats like MARC. While RDA has some advantages, there are also ongoing considerations and discussions around its implementation.