This article makes introduction and discussion on sear ch tools, which involves search engine, subject directory meta search engine, gopher .

本文对因特网搜索工具进行了介绍和探讨，涉及到机器人搜索引擎、主题目录、元搜索引擎、浏览器等。

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Your mail-handling software would scan each message to see if either the sender's name could be found in your personal directory or a magic word could be found in the subject field.

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