G.I. Microchip

Old tags are for the dogs

First they start phasing out the classic Army Jeep in favor of a zippier modern vehicle. Now, if the Soldiers' Data Tag Task Force at Fort Benjamin Harrison in Indianapolis has its way, the G.I.'s stamped metal dog tag will be replaced by a plastic wafer that only a computer can read and only an engineer could love.

The prototype, developed by Datakey Inc., located near Minneapolis, is about the same size as an old-fashioned dog tag. Saw-toothed on the edges and made of chocolate-colored plastic, it contains an embedded magnetic bit on which information about a...

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