This document summarizes the upgrade path to Oracle E-Business Suite Release 12.1.3 and new enhancements in 12.1.3. It discusses the interoperability database versions, technology updates from R12.1.1 to R12.1.3 including autoconfig, menu security and in-context diagnostics enhancements. It also provides an Apps-DBA, developer and end user perspective on changes in R12.1.3 like lightweight MLS, case sensitive passwords and integrated concurrent processing with OBI Publisher.