Big screens, small gadgets and fast wireless connections have received much attention at the Comdex technology trade show this week, but a mundane product quietly unveiled at Microsoft's booth may have more of an impact on the average computer user.
On display was an electronic stamp the U.S. Postal Service plans to sell to certify authenticity and delivery time of e-mail.
The technology, called "electronic postmarks," will not necessarily end the era of free e-mail. But it does create a "first class" version with a small delivery charge.
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