A camera is mounted on a building near Temple University in Philadelphia. Humberto Fernandini, with the company that owns the building, says the owners plan to register their cameras for the police department's new program. Elizabeth Fiedler for NPR hide caption

itoggle caption Elizabeth Fiedler for NPR

This June 2, 2010, file photo shows the AT&T logo in Washington, D.C. The U.S. Justice Department will seek to block AT&T's proposed $39 billion acquisition of T-Mobile. Etienne Franchi/AFP/Getty Images hide caption

itoggle caption Etienne Franchi/AFP/Getty Images

Two women check their cellphones as they hawk their wares on a bridge over the Artibonite River, whose waters are believed to be the source of Haiti's 2010 cholera outbreak. Nicholas Kamm/AFP/Getty Images hide caption

itoggle caption Nicholas Kamm/AFP/Getty Images

A screenshot of SFpark, an app that lets San Francisco drivers see available parking spaces as well as each space's cost. Courtesy of SFpark hide caption

itoggle caption Courtesy of SFpark

Online reviews are many, but it's often difficult to tell the real ones from the fakes. To help sort the genuinely delighted customers from profit-driven praise, researchers at Cornell University have developed software that can successfully tell the difference. Yanik Chauvin/iStockphoto hide caption

itoggle caption Yanik Chauvin/iStockphoto

A buyer tests a Motorola Droid phone in this photo from January. Google purchased Motorola for $12.5 billion, gearing up in a patent war that has seen corporations try to pummel their competitors. Julie Jacobson/AP hide caption

itoggle caption Julie Jacobson/AP

Steve Jobs stepped down as Apple CEO Wednesday. And now many are left wondering what's next for the company. Paul Sakuma/AP hide caption

itoggle caption Paul Sakuma/AP