pigeon (plural pigeons) One of several birds of the family Columbidae, which consists of more than 300 species. A person who is a target or victim of a confidence game. Synonyms (bird): columbid , columbiform (Columbiformes), culver, dove (person who is a target or victim of a confidence game): dupe, fish, mark, mug, sucker, rube, stiff
The NIIN is the invariable part of the NSN, and it remains associated with the item of supply concept throughout its life cycle. However, the NSC may change if there is a change to the classification structure. NSNs are usually assigned to items that are needed on a recurring basis.
The NATO Stock Number consists of the NATO Supply Class (NSC or FSC) and the National Item Identification Number (NIIN). However the NIIN alone uniquely identifies the item, the FSC merely adds context by indicating the general classification of the item.