Apple Retail taught the company a great deal concerning the future of retail, and a quiet technology acquisition shows it intends going with the retail flow as it invests in a system that turns iPhones into POS payment systems.
Apple Pay and Apple Payments
While we already use Apple Pay to purchase items contact free using iPhones and Apple Watch, when it comes to taking payments most retailers rely on third-party payment systems. Names like Square, Izito, PayPal Here, Sumup and other providers work to fill the gap, usually using some form of dongle.
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Source: Computer World