The objective of this part is to define additional ARINC 653 core software capabilities to ease integration on a variety of Integrated Modular Avionics (IMA) hardware platforms by allowing platform suppliers to extend and customize it for use with their unique hardware platform. The objective of Part 5 is to define additional recommended capabilities when implementing ARINC 653 core software using a Commercial off the Shelf (COTS) ARINC 653 Operating System (O/S).