Widely used in Hong Kong, the Octopus card is used for purchases on public transport, in convenience stores, fast food restaurants and other places where purchases can be made. In addition it's also used for office and residential premises access control. Each Octopus card looks like a basic credit card but has a built-in microchip containing an "electronic purse" and other applications that records transaction details. To use the card, owners simply wave the card over a reader and the information or financial transaction is completed automatically.
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