A Magnetic Swipe card is a type of card capable of storing data by modifying the magnetism of tiny iron-based magnetic particles.
Thursday, September 1, 2011
Metrocard bifold swipe
Every time I'm down to $2, the turnstile asks me to ''swipe again at this turnstile'' and in effect take away the extra transfer ability. So I decided to document this with my cell phone camera
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