@ -574,7 +574,7 @@
#### Operating systems
* [Computer Science from the Bottom Up ](http://www.bottomupcs.com )
* [How to Make a Computer Operating System (Work in Progress) ](https://github.com/SamyPesse/How-to-Make-a-Computer-Operating-System )
* [How to Make a Computer Operating System ](https://github.com/SamyPesse/How-to-Make-a-Computer-Operating-System ) (:construction: *in process* )
* [How to write a simple operating system in assembly language ](http://mikeos.sourceforge.net/write-your-own-os.html ) - Mike Saunders (HTML)
* [Operating Systems and Middleware ](https://gustavus.edu/mcs/max/os-book/ ) (PDF and LaTeX)
* [Operating Systems Concept 9th edition ](http://codex.cs.yale.edu/avi/os-book/OS9/slide-dir/ ) - Avi Silberschatz, Peter Baer, Galvin Greg Gagne (PDF)
@ -1044,7 +1044,7 @@
* [Elixir School ](https://elixirschool.com ) (HTML)
* [Études for Elixir ](http://chimera.labs.oreilly.com/books/1234000001642/index.html ) (HTML)
* [Getting Started Guide ](http://elixir-lang.org/getting-started/introduction.html ) (HTML) [(PDF, MOBI, EPUB) ](https://github.com/potatogopher/elixir-getting-started )
* [Joy of Elixir ](https://joyofelixir.com ) - Ryan Bigg *(in progress)* (HTML) - [Source ](https://github.com/radar/joyofelixir )
* [Joy of Elixir ](https://joyofelixir.com ) - Ryan Bigg (HTML) - [Source ](https://github.com/radar/joyofelixir ) (:construction: *in process* )
* [Learning Elixir ](http://learningelixir.joekain.com ) - Joseph Kain Blog (HTML)
@ -1265,7 +1265,7 @@
* [MaintainableCSS ](http://maintainablecss.com )
* [Pro HTML5 Programming ]( http://apress.jensimmons.com/v5/pro-html5-programming/ch0.html )
* [Scalable and Modular Architecture for CSS ](https://smacss.com ) - Jonathan Snook
* [Thinking in HTML ](https://www.packtpub.com/packt/free-ebook/thinking-in-html ) - Aravind Shenoy (free eBook)
* [Thinking in HTML ](https://www.packtpub.com/packt/free-ebook/thinking-in-html ) - Aravind Shenoy
* [Understanding Flexbox: Everything you need to know ](https://ohansemmanuel.github.io/uf_download.html ) - Ohans Emmanuel
* [Web Audio API ](http://chimera.labs.oreilly.com/books/1234000001552 ) - Boris Smus
@ -1601,7 +1601,7 @@ For resources on Angular, Backbone, D3, Dojo, Ember, Express, jQuery, Knockout,
* [HGInit - Mercurial Tutorial by Joel Spolsky ](http://hginit.com )
* [Mercurial: The Definitive Guide ](http://hgbook.red-bean.com )
* [Mercurial: The Definitive Guide 2nd edition ](https://book.mercurial-scm.org ) *(in progress)* ([source repository](https://bitbucket.org/hgbook/hgbook))
* [Mercurial: The Definitive Guide 2nd edition ](https://book.mercurial-scm.org ) ([source repository](https://bitbucket.org/hgbook/hgbook)) (:construction: *in process* )
### Mercury
@ -1736,7 +1736,7 @@ For resources on Angular, Backbone, D3, Dojo, Ember, Express, jQuery, Knockout,
* [Perl 6 Introduction ](http://perl6intro.com )
* [Perl 6 Programming ](https://en.wikibooks.org/wiki/Perl_6_Programming )
* [Think Perl 6 ](http://greenteapress.com/thinkperl6/thinkperl6.pdf ) - Allen Downey (PDF)
* [Using Perl 6 ](https://github.com/perl6/book/ ) (work in progress )
* [Using Perl 6 ](https://github.com/perl6/book/ ) (:construction: *in process* )
### PHP
@ -1984,7 +1984,7 @@ For resources on Angular, Backbone, D3, Dojo, Ember, Express, jQuery, Knockout,
### QML
* [Qt5 Cadaques ](http://qmlbook.github.io ) - Juergen Bocklage-Ryannel and Johan Thelin (HTML, PDF, ePub) (work in progress )
* [Qt5 Cadaques ](http://qmlbook.github.io ) - Juergen Bocklage-Ryannel and Johan Thelin (HTML, PDF, ePub) (:construction: *in process* )
### R