How Social Networks influence change

My space, Twitter and Facebook are some of the popular social networking sites .They give the opportunity to create a personal profile and interact with other users through chat, applications, micro-blogging and sharing photos.Almost every one, regardless of age, is plugged into one or two of these social networking sites. Post Offices are empty because letters and stamps are replaced by inboxes and emails.  The networks affect also the work place of the users.
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