Merge branch 'pr/1976'

da317ada · Victor Felder · 43294d13 · 20b940a3 · da317ada
隐藏空白更改
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free-programming-books.md free-programming-books.md +2 -1

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 * [Coursera](https://www.coursera.org)
 * [edX](https://www.edx.org)
 * [FutureLearn](https://www.futurelearn.com)
-* [MIT OCW](http://ocw.mit.edu/index.htm)
+* [MIT OCW](http://ocw.mit.edu)
+* [openHPI](https://open.hpi.de)
 * [Platzi](https://courses.platzi.com)
 * [Udacity](https://www.udacity.com)