Free PDF Books, EPUB Books, Templates & Programming Codes Tutorials.

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熊猫搜索，熊猫搜书，聚合第三方文档、电子书导航网站和搜索引擎，快速检索网络资源。

This site lists free online computer science, engineering and programming books, textbooks and lecture notes, all of which are legally and freely available.

中文数字图书馆,图书来自Z-Library.