Universities and some cities are starting to recognize cellphones as efficient tools for protecting and connecting students and citizens. More than 233 million people in the U.S. subscribe to a cellphone service, and many of those people view their cellphones as the one item they do not leave the house without. University officials and community leaders are just now starting to see how these staples of 21st century society can be turned into tools to keep citizens and students better informed about their community and better protected from harm.

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