Which transportation company first introduced onboard retail shopping catalogs for passengers in the 1960s, revolutionizing in-transit shopping?

The intersection of retail and transportation has created innovative shopping experiences for travelers. From airport duty-free zones to in-flight shopping catalogs, the transportation sector has developed unique retail models that cater to passengers on the move. This trivia question explores a significant milestone in transportation retail history that changed how consumers shop while traveling.

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Pan American World Airways (Pan Am)
Union Pacific Railroad
Greyhound Bus Lines
Cunard Line Cruises