The Information Highway.

The U.S. needs to start treating the Internet like electricity or railroads, law professor and author Susan Crawford says. "We can't create a level playing field for all Americans or indeed compete on the world stage without having some form of government involvement," she says.

Many people generate an immense amounts of digital data during a single day — often without a second thought. But Stephen Baker, a senior writer at BusinessWeek, warns that the information generated is being monitored by a group of entrepreneurial mathematicians.

Linguist Geoff Nunberg on the word "virtual" as In virtual reality.