Which contactless payment system was first implemented in a major public transportation network, revolutionizing transit point-of-sale technology?

The transportation industry has undergone significant digital transformation in recent years, particularly in how passengers pay for their journeys. Point-of-sale systems in public transit have evolved dramatically, changing the way we commute. Test your knowledge about the technology that's revolutionized how we pay for transportation services around the world!

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London's Oyster Card (2003)
Hong Kong's Octopus Card (2004)
Tokyo's Suica Card (2006)
New York's MetroCard (2000)