Ester Gerston and Gloria Ruth Gordon, early programmers working on the ENIAC computer in 1946. U.S. Army hide caption

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Twitter co-founder Biz Stone is one of five celebrity directors taking part in a Canon-sponsored experiment called Project Imaginat10n. His short film, the inspiration for which was crowdsourced via the Internet and social media, focuses on familial loss and the process of grieving. Justin Sullivan/Getty Images hide caption

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BioShock Infinite revolves around an Aristotelian tragedy with tragic heroes, grounded in a floating city set in 1912. Courtesy of Irrational Games/2K Games hide caption

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Egyptians use their mobile phones to record celebrations in Cairo's Tahrir Square, the epicenter of the popular revolt that drove Hosni Mubarak from power in 2011. Twitter was often used to record happenings during the Arab Spring. Mohammed Abed/AFP/Getty Images hide caption

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Strachwitz and Ry Cooder backstage at Arhoolie's 50th anniversary celebration. Mike Melnyk/Arhoolie Records hide caption

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Festival attendees experiment with Leap Motion technology. Elise Hu/NPR hide caption

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