Designed for kids but useful for adults, a web site that's devoted to education has put together a list of different search engines and what they're good for.
One lesson from this educational web site: Google isn't everything, but it is most things. Many search sites use Google as a base and add additional features. But the list also shows that there's a "Deep Web" that isn't indexed by Google, information that the web site owners restrict to their own site. The existence of the "Deep Web" implies that new business models will be needed to take that information out of the confines of the restricted web sites, and I wonder what those business models might be — because someone will become rich by discovering them.
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