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Allowed people to start sending letters but virtually and made it easier.
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A virtual newsletter that could be really expensive if talking over long distances.
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Allowed people to post articles or posts to newsgroups.
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Used for file sharing, link sharing, and to keep in touch.
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The first modern network that allowed people to make a profile and make friends online.
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A social network built around blogs that encouraged users to follow one another and interact with each other.