This document defines the aircraft industry's standards for Loadable Software Parts (LSPs) and Media Set Parts (MSPs). It describes the common principles and rules to be applied to any part of a data load system to ensure compatibility and inter-operability of software parts. It includes part numbering, content, labeling, and formatting of an LSP, and a Media Set containing LSPs. Supplement 5 refers to a companion document, ARINC Report 645: Common Terminology and Functions for Software Distribution and Loading.