Which point-of-sale innovation was first deployed by the U.S. military in 1990 during Operation Desert Shield/Storm to revolutionize how troops could purchase goods?

Throughout military history, post exchanges (PX) and base exchanges have been crucial for troop morale and welfare. These military retail operations have evolved dramatically from simple sutlers' wagons to sophisticated retail environments. This poll tests your knowledge about a groundbreaking point-of-sale innovation that transformed how military personnel accessed goods during deployment in the modern era.

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Mobile Field PX terminals with satellite credit card processing
Military scrip-based electronic payment cards
RFID-enabled personal identification shopping system
Biometric payment verification terminals