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DO YOU ever wish there was something that could stop you forgetting things like your keys, cellphone or wallet? Well soon your wristwatch could do just that, thanks to an idea being developed by engineers in Seattle.

The system is based on radio frequency identification (RFID) tags, small electronic labels originally designed to automate commercial goods tracking. The idea is that you label all the items you carry about every day with RFID tags, which only cost about 25 cents a piece. Then if you leave anything important behind, your RFID-enabled watch notices that one of the tags is missing.…

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