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Re:Decoding the MetroCard, Part 2: Research and Past Attempts by woodruffw on Monday July 18, 2016 @08:54PM (#12118867)
Fun fact: The MVMs (MTA Vending Machines) run OS/2 Warp/EComStation (or did until a few years ago). I've also seen some running what looked like NT 4, although I'm not certain.

Considering how old that software stack is, it's remarkable how well the MVMs run. In 19 years of buying MetroCards and riding the subway, I don't think I've ever had one break down on me. I've had my fair share of scanning errors and bad cards, but I'm more inclined to blame that on the quality of the magnetic strip and normal wear.

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