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Search engines

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  E-commerce & publishing  11
Game design  3
Jobs  5
Legal stuff  10
Management  1
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Wikipedia - The Free Encyclopedia
This encyclopedia is excellent when looking for a quick overview on various subjects. Details are scarse but it is an excellent starting point when searching for information.

In my opinion, the very best search engine available.

Dave Perry's Game Industry Map
Dave Perry
A global map of game companies.