Free E-Books
Free Online Computer Science and Programming Books, Textbooks, and Lecture Notes
This site lists free online computer science, engineering and programming books, textbooks and lecture notes, all of which are legally and freely available over the Internet. Throughout this site, other terms are used to refer to a book, such as ebook, text, document, monogram or notes.

Open Textbooks
Open Textbooks are high quality open-access textbooks that can be used for no cost online, and can be printed for a low cost.

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