Passengers "shop" by scanning QR - Quick Response - codes of the items they want to buy using their smart phones. These goods are later delivered to their home address.

地铁乘客可通过智能手机扫描商品条码，即商品的快速响应码进行购物，随后，所购商品就会被送到乘客家中。

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Especially when it comes to security breaches done through fake quick response codes, or QR codes (crossword puzzle looking bar code scan-able by some smart phones), the iPhone is a lot safer, he says.

FORBES: Is The iPhone Safer Than Google's Android?

As well as free wi-fi, it said the money would also fund signs with Quick Response (QR) codes which visitors would be able to scan on their smart phone to be directed to events and offers in the area.

BBC: Mansfield residents and businesses to chip in for wi-fi