Which retail innovation was first widely implemented in military exchanges during the 1990s, revolutionizing how deployed service members could shop for personal items?

Military post exchanges (PX) and base exchanges (BX) have a fascinating retail history that closely mirrors civilian retail evolution while meeting the unique needs of service members. These military retail operations have pioneered innovations that later influenced the broader retail sector. This poll tests your knowledge about a pivotal retail innovation in military exchange history that transformed how service members shopped during deployment.

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Mobile PX trucks that brought retail to remote forward operating bases
Online ordering systems with shipping to APO/FPO addresses
Contactless payment systems using military ID cards
Personalized shopping assistants who collected items based on service member preferences