Hewlett-Packard has invented a wireless data chip that can store 100 pages of text or 15 seconds of video on a dot about half the size of a rice grain, with potentially dramatic applications in everything from health care to photography and marketing.

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The ultrasound generator used in this technique can focus its energy into a space about the size of a grain of rice.

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Micro chipping involves a vet inserting a tiny device, about the size of a grain of rice, under the dog's skin.

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And have your vet inject your pet with a tiny microchip implant (it's about the size of a grain of rice).

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Such tags, the size of a grain of rice, are currently used to tag everything from pets to televisions, and cost a few dollars apiece.

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