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Geocities allowed people to create websites.
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Angelfire allowed people build blogs and photo galleries.
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Sixdegrees.com allowed people to create profiles and send messages
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yahoo allowed people to access websites and information
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waybackmacine allowed users to see how websites used to look.
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MySpace allowed people to create blogs, talk to other people and even play video games.
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Facebook allowed people to message each other, post images and opinions.
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Reddit allowed people to post images, videos and links.
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YouTube allowed people to post videos and to like and comment on them.
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Twitter allowed people to tweet and retweet posts.