| Directories:
Examples |
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| w | The
cream of the crop:� Yahoo !� It is a |
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| �closed�
directory, meaning that its editors |
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| are
its own employees |
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| w | Open
Directory Project uses unpaid editors |
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| and
is used by Google (and formerly |
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| AltaVista);
it is �open� |
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| w | About.com
is a half-open, half-closed hybrid |
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