http://en.wikipedia.org/wiki/List_of_search_engines http://en.wikipedia.org/wiki/Web_search_engine Google的搜索引擎软件目录 [http://dir.google.com/alpha/Top/Computers/Software/Internet/Servers/Search/] 局域网搜索引擎 [http://www.worldhello.net/doc/search_engine/search-engine.html]