by the numbers

20,000

Number of unauthorized computer files of popular TV programs, such as “The Simpsons” and “Alias,” that are being offered for free on the Internet.

1.75

Number of subscribers, in millions, to Virgin Mobile USA, the fastest-growing cell phone service.

30,000

Number of photos — about half of which are from the National Geographic Society — offered through Amazon.com and Getty Images in a new online service.