nate1040 (USA)
Mobile Telephone Book
Download the local area telephone book listings (with data from telephone company) into a chip or card. Create a device like a PDA that you insert the card and then have the local telephone numbers.

You could buy or subscribe to whatever zip codes or area codes you desire. Company supplying cards and info makes monthly revenue. People on the road (salesmen) would love it.

Reward: A life subscription of these for my kids and myself.

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