Which transportation company was the first to implement a contactless smart card payment system for public transit, revolutionizing the industry's point-of-sale approach in the 1990s?

The transportation industry has undergone significant technological advancements in its point-of-sale systems over the years. From paper tickets to mobile boarding passes, the way we purchase and validate transportation has evolved dramatically. This trivia question tests your knowledge about a pioneering POS innovation that transformed how passengers interact with public transit systems worldwide.

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Transport for London (Oyster card)
Hong Kong's MTR Corporation (Octopus card)
Japan Railways Group (Suica card)
Metropolitan Transportation Authority NYC (MetroCard)