May 31, 2008 2:47 PM PDT

Billboards that look back

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California city gets video surveillance fever


May 14, 2008

New technology has made it possible, using tiny cameras, to gather details about people looking at billboard ads, such as their age or gender.
(From The New York Times)

The story "Billboards that look back" published May 31, 2008 at 2:47 PM is no longer available on CNET News.

Content from The New York Times expires after 7 days.

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