Tristan Walker founded Code2040, an internship program designed to bring Latino and black engineering undergrads to Silicon Valley. David Paul Morris/Bloomberg via Getty Images hide caption

itoggle caption David Paul Morris/Bloomberg via Getty Images

Brooke Hammerling, the founder of Brew Media Relations, says she created her own firm because she got sick of a mix of dismissive tech guys and sexism inside some companies. Christof Stache/dpa/Landov hide caption

itoggle caption Christof Stache/dpa/Landov

Taneka Armstrong, 20, is learning about different aspects of the tech industry — from coding to sales — through the nonprofit group Hack the Hood. Aarti Shahani/NPR hide caption

itoggle caption Aarti Shahani/NPR

An image from the Six Californias website shows the proposed borders of its plan to slice the state into areas that the plan's backers say would be more manageable. Six Californias hide caption

itoggle caption Six Californias

Cast and crew on the set of HBO's Silicon Valley (from left): Zach Woods, Thomas Middleditch, Alec Berg, Mike Judge, T.J. Miller and Kumail Nanjiani. Jaimie Trueblood/Courtesy of HBO hide caption

itoggle caption Jaimie Trueblood/Courtesy of HBO

Twitter made its debut on the New York Stock Exchange in November. Both the social media giant and the relative newcomer Snapchat are valued in the billions, but neither company has yet turned a profit. Emmanuel Dunand/AFP/Getty Images hide caption

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Several Silicon Valley entrepreneurs are developing services that manage consumers' investment portfolios with algorithms rather than people. iStockphoto hide caption

itoggle caption iStockphoto

A prototype of a flexible battery from Imprint Energy, one of 40 companies working on battery technology in the San Francisco Bay Area. Imprint Energy hide caption

itoggle caption Imprint Energy

A long line for a men's room at a 2009 tech conference in Omaha, Neb. Photos of this situation have now inspired a Twitter feed. SleepyJeanne/Flickr hide caption

itoggle caption SleepyJeanne/Flickr

Kenyan Susan Oguya created an app to help farmers in her homeland. Shown here in the office of her company, M-Farm, she also belongs to the group Akirachix, which seeks to bring more Kenyan women into the tech world. Gregory Warner hide caption

itoggle caption Gregory Warner

Marissa Mayer left Google to become the CEO of Yahoo. She was Google's 20th hire and is responsible for the look and feel of many of Google's major products. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images