's Nicholas Negroponte describes the difference between physical products and information products in the digital age as the difference between moving atoms around (physical products such as cars and computers) and moving bits around (electronic products such as financial analyses and news broadcasts).

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"The fundamental difference is that digital cameras will work 24 hours a day, seven days a week, 52 weeks a year, " he said.

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Besides the obvious difference in environmental impact, how does digital stack up against snail mail?

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