Which retail innovation was FIRST introduced by the Army & Air Force Exchange Service (AAFES) to revolutionize military shopping?

Military exchanges (PX/BX) have evolved significantly over the decades, offering unique retail experiences for service members and their families. These government-operated department stores have pioneered several retail innovations and customer loyalty programs specifically tailored to military communities. Test your knowledge about how these specialized retail operations have developed to serve those who serve their country.

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The Military Star Card loyalty program (1979)
Online PX shopping platform (1985)
Deployment zone mobile retail units (1974)
Tax-free technology purchasing program (1982)