Which retail payment innovation was FIRST implemented in U.S. military exchanges (PX/BX) during the 1980s, dramatically changing how service members shopped?

The military's Post Exchange (PX) system revolutionized retail for service members, providing essential goods at reasonable prices while stationed far from home. These stores have evolved from simple sutler wagons following troops to sophisticated retail operations. This poll tests your knowledge about how modern retail payment systems transformed military shopping experiences during a crucial period of innovation.

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STAR Card - The military's proprietary credit card system
Magnetic stripe ID card integration allowing direct debit purchasing
Eagle Cash - The stored value smartcard system
Military Exchange Mobile Payment App