ROBERT SIEGEL, HOST:
Now, the cash register re-imagined. Paying for things online with your mobile phone can be as easy as paying with cash but digital payment companies, like PayPal and Square, think the big money for them is still at the register. So they're rushing head-long into brick-and-mortar retail, eager for new ways to make old-fashioned money.
From member station WHYY, Zack Seward has the story.