Micro-blogging services, Twitter branched into the marketing for electronic payments, unveiling a mini credit card swiper that plug into iphone. Twitter founder, Jack Dorsey, said that the device, the Square is aimed particularly to enable small transactions for paying"people like babysitter, the car Parker,the golf instructor". The small black Square plugs into the phone's microphone, turning the iphone into a card reader like the swipe machine widely in US shops and restaurants
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