Technology

ProPublica investigative reporter Peter Maass says that cellphone companies monitor where we are, who we call, what we buy -- and often provide it to law enforcement when requested. "They are collecting a heck of a lot more information than we expect them to be collecting about us," he tells Fresh Air.

What does the Internet look like? Journalist Andrew Blum decided to find out. His new book, Tubes, is a journey into the Internet's physical infrastructure -- where our data is stored and transmitted.

Parents should be paying very close attention to the digital media their children are using, says child advocate James Steyer. "Young people in particular often self-reveal before they self-reflect," he says. "There is no eraser button today for youthful indiscretion."

Advertisers collect information with every digital move people make. They then target ads based on that information. Communications scholar Joseph Turow worries that advertisers will use such data to discriminate against people and put them into "reputation silos."

YouTube's future success depends on increasing the amount of time people spend watching videos on the site. The Google-owned website plans to roll out more than 100 new, professionally produced channels in a push to draw viewers away from television, and onto the Web.

As protesters in the Middle East use social media to communicate, the regimes they're battling are using sophisticated technology to intercept their emails and text messages. Journalist Ben Elgin details how Western companies are providing software and equipment to help Middle Eastern governments crack down on dissidents.

Technologies like GPS and social media are posing new challenges to interpreting the Constitution's guarantees of privacy and free speech. Law professor and journalist Jeffrey Rosen says we're now in an era the Founding Fathers could never have imagined, in which private companies are determining the rules for what can be shared.

Facebook, Google, Amazon and Apple are expanding rapidly into finance, advertising, media and retail. Tech writer Farad Manjoo outlines how the four companies are heading in new directions -- and encroaching on each other's territory -- as they try to expand their customer base.

The "i" prefix began as an abbreviation for the word "Internet," but ended up being much more than that. "By the time i- was fleshed out, Apple had transformed itself from a culty computer-maker to a major religion," says linguist Geoff Nunberg.

In a new book, medical ethicist Harriet Washington details how genes and tissues are increasingly being patented by pharmaceutical and biotechnology companies. Those firms, she argues, are focused more on their profits than on the medical needs of patients.

As many as 12 million computers worldwide have been infected with a highly encrypted computer worm called Conficker. Writer Mark Bowden details how Conficker was discovered, how it works, and the ongoing programming battle to bring down Conficker in his book Worm: The First Digital World War.

Constantly having access to our cellphones is changing the way we interact with the world, says technology writer Brian X. Chen. In a new book, he explains how being "always on" will affect law enforcement, the medical community and higher education.

Online dating sites are now a multibillion-dollar industry. But how do they match people together? New Yorker writer Nick Paumgarten recently profiled several of the major online dating websites to find out how they pair people with compatible romantic mates.

Science writer Susan Freinkel chronicles the rise of plastic in consumer culture — and its effects on the environment and our health — in Plastic: A Toxic Love Story. Freinkel says plastics leach potentially harmful chemicals into our bloodstream — and that scientists are now figuring out what that does to our bodies.

The co-founder of Twitter talks about how the service was used in Egypt to help organize the protests, and about the rumors that the popular microblogging service could be purchased by Google or Facebook.

Computerized algorithms now do much of the work on Wall Street. Financial journalist Felix Salmon says they've become ingrained in the financial system -- but are also increasingly complex and difficult to regulate.

What happens to your online presence when you die? Evan Carroll and John Romano edit The Digital Beyond, a website that helps users plan what happens to their online content after death. They suggest you start planning now for the inevitable.