MIT is one of several schools that offer classes through edX, which provides free online courses in partnership with some of the country's top universities. Joe Raedle/Getty Images hide caption

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More than 600 Porto city buses and taxis have been fitted with routers to provide free Wi-Fi service. It's being touted as the biggest Wi-Fi-in-motion network in the world. Sérgio Rodrigues/Veniam hide caption

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The sun sets as a visitor uses his mobile phone Monday during the opening day of the 2015 Mobile World Congress in Barcelona. Wall Street Journal reporter Ryan Knutson — interviewed from the conference Monday via Skype by NPR's Robert Siegel — says that for some smartphone users, Wi-Fi may be able to replace most of the functionality of a cellphone carrier. Josep Lago/AFP/Getty Images hide caption

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A man takes a "selfie" while waiting in line to cast his vote in the Wisconsin gubernatorial race in November. Darren Hauck/Getty Images hide caption

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Kevin Spacey's President Frank Underwood is embattled and often frustrated in the third season of Netflix's House of Cards. David Giesbrecht/Courtesy of Netflix hide caption

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Operators at a Bell System telephone switchboard, as photographed by the Department of Labor Women's Bureau. U.S. National Archives hide caption

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At the start of a meeting to decide the issue of net neutrality, Federal Communications Commission Chairman Tom Wheeler (center) holds hands with FCC Commissioners Mignon Clyburn (left) and Jessica Rosenworcel at the FCC headquarters Thursday. Mark Wilson/Getty Images hide caption

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T-Mobile CEO John Legere pitches a plan that allows unlimited music streaming without additional data charges. Some net neutrality proponents want the FCC to limit plans like these; the commission says it will review them on a case-by-case basis. Ted S. Warren/AP hide caption

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Upasana Kone's husband works at Microsoft on an H-1B tech visa, but her spouse visa does not include a work permit. The Obama administration has announced a possible rule change to allow some spouses to get a job. Upasana Kone hide caption

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A drone is displayed Wednesday at Paris store Azur Modelisme. Law enforcement officials in the city are concerned about recent unexplained drone fly-bys of high-security sites, including the Eiffel Tower and the U.S. embassy. Eleanor Beardsley/NPR hide caption

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