Which transportation payment innovation was first introduced in Hong Kong's MTR system in 1997 before becoming a global standard for transit fare collection?

In today's transportation industry, the evolution of payment and ticketing systems has transformed how passengers interact with transit services. From paper tickets to contactless payments, point-of-sale technology in transportation has undergone revolutionary changes. This trivia question explores a key innovation that changed how millions of commuters pay for their daily journeys. Test your knowledge about transportation payment technology history!

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Octopus card - the first widely adopted contactless smart card payment system for public transportation
RFID ticket scanners - the first automated gate system using radio frequency identification
Mobile QR code tickets - the first smartphone-based ticketing solution
EMV transit payment - the first open-loop payment system accepting credit cards directly at fare gates