The United States Army divides supplies into ten numerically identifiable classes of supply. The North Atlantic Treaty Organisation (NATO) uses only the first five, which NATO allies have agreed to share a common nomenclature with each other based on a NATO Standardization Agreement (STANAG). A common naming convention is reflective of the necessity for interoperability and mutual logistical support.Class IClass IIClass IIIClass IVClass VClass VIClass VIIClass VIIIClass IX The United States Army divides supplies into ten numerically identifiable classes of supply. The North Atlantic Treaty Organisation (NATO) uses only the first five, which NATO allies have agreed to share a common nomenclature with each other based on a NATO Standardization Agreement (STANAG). A common naming convention is reflective of the necessity for interoperability and mutual logistical support. Class VI is usually associated with the liquor store on a U.S. military base, typically a U.S. Army or U.S. Air Force installation.