The world’s largest credit and debit card company and its competitors are turning their attention to mobile payments, an industry given fresh impetus by the entry of Apple Inc (AAPL.O). Visa, along with Mastercard Inc (MA.N) and American Express Co (AXP.N), have partnered with Apple in the launch of a system – Apple Pay – that allows iPhone users to pay for anything from office supplies to burgers at the tap of a button. Several analysts have estimated that mobile payments will be a $1 trillion global industry by 2017.