Hitachi's Smallest RFID device

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engadget.com: Hitachi's RFID powder freaks us the heck out

bbcnews.com: World's tiniest RFID tag unveiled

The world's smallest radio frequency identification tags have been unveiled by Japanese electronics firm Hitachi.

The minute devices measure just 0.05mm by 0.05mm (0.002x0.002in) and to the naked eye look like spots of powder.

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What is RFID?

Radio Frequency Identification (RFID) is an automatic identification method, relying on storing and remotely retrieving data using devices called RFID tags or transponders. An RFID tag is an object that can be attached to or incorporated into a product, animal, or person for the purpose of identification using radio waves. (Source: Wikipedia)

Most of us would like to have devices (big boys' toys) as compact as possible. It would be convenient to bring around these devices especially for people who are always on the road.

Many technical guys or geeks may want to play around with such new devices, and entrepreneurs to make the most of out of it. However, there are people who opposed or wouldn't like to have such devices due to threat of privacy.

Sometimes you may wonder why there are people who always look at the negative side first before looking the positive impact that a new technology may bring.

We look at cellphones with cameras. When events or disasters happen, this cameras were used to record events as it happened, and everyone is happy especially the media. But these are the very the same devices used inappropriately like spying on people.

Any good thing is always like a two-edge sword! It can be used for good or bad purpose. Simple as that. This means that anybody can use it for his own purpose.