Which retail innovation was pioneered by the Imperial War Museum in London that revolutionized military history merchandise?

Military museums have undergone significant retail transformations in recent decades, evolving from simple souvenir shops to sophisticated retail experiences that blend education, commemoration, and commerce. This trivia question focuses on a revolutionary retail innovation that changed how military history is presented and marketed to museum visitors worldwide.

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The "Experience-Based Retail" model where merchandise is organized by historical conflicts rather than product type
The "Artifact Replica Program" allowing visitors to purchase museum-quality reproductions of weapons and uniforms
The "Veterans' Workshop" where retired military personnel craft and sell handmade souvenirs
The "Virtual Battle Collection" offering AR-enhanced merchandise that displays historical battle scenes when scanned