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Square: Jack Dorsey Twitter Co-Foundr Unveils New Startup

techcrunch.com | Posted 05.25.2011 | Technology

We've been tracking Twitter founder Jack Dorsey's Square since May when we first got the details on the new mobile phone payment service. Today the...

Square: Jack Dorsey Demos New iPhone Payment Device (VIDEO)

Posted 05.25.2011 | Technology

Twitter co-founder Jack Dorsey has just unveiled his new startup, Square, which offers a mobile payment system that hopes to displace credit cards wit...