Which of the following definitions corresponds to NIIN?

The correct answer is the National Item Identification Number. This term refers to a unique identifier assigned to each item in the U.S. supply system that falls under the National Stock Number (NSN) framework. The NIIN is crucial for inventory management, procurement, and logistics within the military and other government operations, as it provides a standardized way to reference and track items across various systems and databases.

Understanding the NIIN is essential for effective supply chain management. Having a unique number for each item ensures that it can be accurately identified, ordered, and controlled in inventory systems, which helps prevent errors and facilitates better coordination among supply chain participants. The NIIN consists of the last nine digits of the NSN and plays a vital role in maintaining the integrity of inventory records, which is critical for operations and readiness in the USMC and other military branches.