@ -475,6 +478,7 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
* [Daily Design Patterns](https://web.archive.org/web/20170930132000/https://www.exceptionnotfound.net/downloads/dailydesignpattern.pdf) - Matthew P Jones (PDF)
* [Daily Design Patterns](https://web.archive.org/web/20170930132000/https://www.exceptionnotfound.net/downloads/dailydesignpattern.pdf) - Matthew P Jones (PDF)
* [Data Structures and Algorithms with Object-Oriented Design Patterns in C#](https://web.archive.org/web/20161220072449/http://www.brpreiss.com/books/opus6/) - Bruno Preiss
* [Data Structures and Algorithms with Object-Oriented Design Patterns in C#](https://web.archive.org/web/20161220072449/http://www.brpreiss.com/books/opus6/) - Bruno Preiss
* [Dissecting a C# Application](https://damieng.com/blog/2007/11/08/dissecting-a-c-application-inside-sharpdevelop) - Christian Holm, Bernhard Spuida, Mike Kruger
* [Dissecting a C# Application](https://damieng.com/blog/2007/11/08/dissecting-a-c-application-inside-sharpdevelop) - Christian Holm, Bernhard Spuida, Mike Kruger
* [Essential C#](https://www.programming-books.io/essential/csharp/) - Krzysztof Kowalczyk, StackOverflow Contributors
* [Fundamentals of Computer Programming with C# (the Bulgarian Book)](http://www.introprogramming.info/english-intro-csharp-book/read-online/) - Svetlin Nakov, Veselin Kolev, et al. (HTML, [PDF, EPUB](https://introprogramming.info/english-intro-csharp-book/downloads/))
* [Fundamentals of Computer Programming with C# (the Bulgarian Book)](http://www.introprogramming.info/english-intro-csharp-book/read-online/) - Svetlin Nakov, Veselin Kolev, et al. (HTML, [PDF, EPUB](https://introprogramming.info/english-intro-csharp-book/downloads/))
* [High level asynchronous programming with Reactive Extensions](https://github.com/petroemil/Rx.Book) - Emil Petro
* [High level asynchronous programming with Reactive Extensions](https://github.com/petroemil/Rx.Book) - Emil Petro
* [Introduction to Rx](http://www.introtorx.com)
* [Introduction to Rx](http://www.introtorx.com)
@ -505,6 +509,7 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
* [CS106X Programming Abstractions in C++](http://web.stanford.edu/class/cs106x/)
* [CS106X Programming Abstractions in C++](http://web.stanford.edu/class/cs106x/)
* [Elements of Programming](http://elementsofprogramming.com) - Alexander Stepanov, Paul McJones (PDF)
* [Elements of Programming](http://elementsofprogramming.com) - Alexander Stepanov, Paul McJones (PDF)
* [Essential C++](https://www.programming-books.io/essential/cpp/) - Krzysztof Kowalczyk, StackOverflow Contributors
* [Financial Numerical Recipes in C++](https://ba-odegaard.no/gcc_prog/recipes/) - Bernt Arne Ødegaard (PDF)
* [Financial Numerical Recipes in C++](https://ba-odegaard.no/gcc_prog/recipes/) - Bernt Arne Ødegaard (PDF)
* [Fundamentals of C++ Programming](https://web.archive.org/web/20191005170118/https://python.cs.southern.edu/cppbook/progcpp.pdf) - Richard L. Halterman (PDF) *(:card_file_box: archived)*
* [Fundamentals of C++ Programming](https://web.archive.org/web/20191005170118/https://python.cs.southern.edu/cppbook/progcpp.pdf) - Richard L. Halterman (PDF) *(:card_file_box: archived)*
@ -989,6 +999,7 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
* [Category wise tutorials - J2EE](https://www.mkyong.com/all-tutorials-on-mkyong-com/) - Yong Mook Kim
* [Category wise tutorials - J2EE](https://www.mkyong.com/all-tutorials-on-mkyong-com/) - Yong Mook Kim
* [Core Servlets and JavaServer Pages, 2nd Ed. (2003)](https://web.archive.org/web/20210126062450/https://pdf.coreservlets.com/) - Marty Hall, Larry Brown *(:card_file_box: archived)*
* [Core Servlets and JavaServer Pages, 2nd Ed. (2003)](https://web.archive.org/web/20210126062450/https://pdf.coreservlets.com/) - Marty Hall, Larry Brown *(:card_file_box: archived)*
* [Data Structures in Java for the Principled Programmer (2007)](https://web.archive.org/web/20190302130416/http://dept.cs.williams.edu/~bailey/JavaStructures/Book_files/JavaStructures.pdf) - Duane A. Bailey (PDF)
* [Data Structures in Java for the Principled Programmer (2007)](https://web.archive.org/web/20190302130416/http://dept.cs.williams.edu/~bailey/JavaStructures/Book_files/JavaStructures.pdf) - Duane A. Bailey (PDF)
* [Essential Java](https://www.programming-books.io/essential/java/) - Krzysztof Kowalczyk, StackOverflow Contributors
* [Essential Javascript](https://www.programming-books.io/essential/javascript/) - Krzysztof Kowalczyk, StackOverflow Contributors
* [Exploring ES6](http://exploringjs.com/es6/) - Dr. Axel Rauschmayer (HTML)
* [Exploring ES6](http://exploringjs.com/es6/) - Dr. Axel Rauschmayer (HTML)
* [Google JavaScript Style Guide](https://google.github.io/styleguide/javascriptguide.xml) - Aaron Whyte, Bob Jervis, Dan Pupius, Erik Arvidsson, Fritz Schneider, Robby Walker (HTML)
* [Google JavaScript Style Guide](https://google.github.io/styleguide/javascriptguide.xml) - Aaron Whyte, Bob Jervis, Dan Pupius, Erik Arvidsson, Fritz Schneider, Robby Walker (HTML)
* [Human JavaScript](http://read.humanjavascript.com/ch01-introduction.html) - Henrik Joreteg (HTML)
* [Human JavaScript](http://read.humanjavascript.com/ch01-introduction.html) - Henrik Joreteg (HTML)
@ -1237,6 +1249,7 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
* [Essential Node.js](https://www.programming-books.io/essential/nodejs/) - Krzysztof Kowalczyk, StackOverflow Contributors
* [From Containers to Kubernetes with Node.js](https://www.digitalocean.com/community/books/from-containers-to-kubernetes-with-node-js-ebook) - Kathleen Juell (PDF, EPUB)
* [From Containers to Kubernetes with Node.js](https://www.digitalocean.com/community/books/from-containers-to-kubernetes-with-node-js-ebook) - Kathleen Juell (PDF, EPUB)
* [Full Stack JavaScript: Learn Backbone.js, Node.js and MongoDB](https://github.com/azat-co/fullstack-javascript) - Azat Mardan
* [Full Stack JavaScript: Learn Backbone.js, Node.js and MongoDB](https://github.com/azat-co/fullstack-javascript) - Azat Mardan
* [How To Code in Node.js - eBook](https://www.digitalocean.com/community/books/how-to-code-in-node-js-ebook) - David Landup, Marcus Sanatan @ Stack Abuse, Digital Ocean (PDF, EPUB)
* [How To Code in Node.js - eBook](https://www.digitalocean.com/community/books/how-to-code-in-node-js-ebook) - David Landup, Marcus Sanatan @ Stack Abuse, Digital Ocean (PDF, EPUB)
@ -1265,6 +1278,7 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
* [Essential .NET Framework](https://www.programming-books.io/essential/netframework/) - Krzysztof Kowalczyk, StackOverflow Contributors
* [Game Creation with XNA](https://en.wikibooks.org/wiki/Game_Creation_with_XNA) - Wikibooks
* [Game Creation with XNA](https://en.wikibooks.org/wiki/Game_Creation_with_XNA) - Wikibooks
* [Getting the Most from LINQPad Succinctly](https://www.syncfusion.com/ebooks/getting-the-most-from-linqpad-succinctly) - José Roberto Olivas Mendoza
* [Getting the Most from LINQPad Succinctly](https://www.syncfusion.com/ebooks/getting-the-most-from-linqpad-succinctly) - José Roberto Olivas Mendoza
* [MonoGame Role-Playing Game Development Succinctly](https://www.syncfusion.com/succinctly-free-ebooks/monogame-role-playing-game-development-succinctly) - Jim Perry and Charles Humphrey
* [MonoGame Role-Playing Game Development Succinctly](https://www.syncfusion.com/succinctly-free-ebooks/monogame-role-playing-game-development-succinctly) - Jim Perry and Charles Humphrey
@ -1604,6 +1622,7 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
### Objective-C
### Objective-C
* [Essential Objective-C](https://www.programming-books.io/essential/objectivec/) - Krzysztof Kowalczyk, StackOverflow Contributors
* [Object-Oriented Programming with Objective-C](https://developer.apple.com/library/ios/documentation/Cocoa/Conceptual/OOP_ObjC/Introduction/Introduction.html#//apple_ref/doc/uid/TP40005149)
* [Object-Oriented Programming with Objective-C](https://developer.apple.com/library/ios/documentation/Cocoa/Conceptual/OOP_ObjC/Introduction/Introduction.html#//apple_ref/doc/uid/TP40005149)
* [Objective-C Notes for Professionals](https://goalkicker.com/ObjectiveCBook/) - Compiled from StackOverflow Documentation (PDF)
* [Objective-C Notes for Professionals](https://goalkicker.com/ObjectiveCBook/) - Compiled from StackOverflow Documentation (PDF)
@ -1700,6 +1719,7 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
* [An Introduction to the PHP Programming Language](https://codeahoy.com/learn/php/toc/) - CodeAhoy (HTML)
* [An Introduction to the PHP Programming Language](https://codeahoy.com/learn/php/toc/) - CodeAhoy (HTML)
* [Essential PHP](https://www.programming-books.io/essential/php/) - Krzysztof Kowalczyk, StackOverflow Contributors
* [PHP 5 Power Programming](http://www.informit.com/content/images/013147149X/downloads/013147149X_book.pdf) (PDF)
* [PHP 5 Power Programming](http://www.informit.com/content/images/013147149X/downloads/013147149X_book.pdf) (PDF)
* [PHP Apprentice](https://phpapprentice.com) - Andrew Davis *(:construction: in process)*
* [PHP Apprentice](https://phpapprentice.com) - Andrew Davis *(:construction: in process)*
* [PHP Best Practices](https://phpbestpractices.org)
* [PHP Best Practices](https://phpbestpractices.org)
@ -1760,6 +1780,7 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
### PostgreSQL
### PostgreSQL
* [Essential PostgreSQL](https://www.programming-books.io/essential/postgresql/) - Krzysztof Kowalczyk, StackOverflow Contributors
* [Postgres Official Documentation](http://www.postgresql.org/docs/)
* [Postgres Official Documentation](http://www.postgresql.org/docs/)
* [Postgres Succinctly](https://www.syncfusion.com/resources/techportal/ebooks/postgres) (PDF, Kindle) (email address *requested*, not required)
* [Postgres Succinctly](https://www.syncfusion.com/resources/techportal/ebooks/postgres) (PDF, Kindle) (email address *requested*, not required)
* [PostgreSQL Notes for Professionals](https://goalkicker.com/PostgreSQLBook/) - Compiled from StackOverflow documentation (PDF)
* [PostgreSQL Notes for Professionals](https://goalkicker.com/PostgreSQLBook/) - Compiled from StackOverflow documentation (PDF)
@ -1774,6 +1795,7 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
* [Creating HTML Reports in PowerShell](https://leanpub.com/creatinghtmlreportsinwindowspowershell/read) - The DevOps Collective Inc. (HTML)
* [Creating HTML Reports in PowerShell](https://leanpub.com/creatinghtmlreportsinwindowspowershell/read) - The DevOps Collective Inc. (HTML)
* [DevOps: The Ops Perspective](https://leanpub.com/devopstheopsperspective/read) - The DevOps Collective Inc. (HTML)
* [DevOps: The Ops Perspective](https://leanpub.com/devopstheopsperspective/read) - The DevOps Collective Inc. (HTML)
* [Ditch Excel: Making Historical & Trend Reports in PowerShell](https://leanpub.com/ditchexcelmakinghistoricalandtrendreportsinpowershell/read) - The DevOps Collective Inc. (HTML)
* [Ditch Excel: Making Historical & Trend Reports in PowerShell](https://leanpub.com/ditchexcelmakinghistoricalandtrendreportsinpowershell/read) - The DevOps Collective Inc. (HTML)
* [Essential PowerShell](https://www.programming-books.io/essential/powershell/) - Krzysztof Kowalczyk, StackOverflow Contributors
* [Layman’s Guide to PowerShell 2.0 remoting](https://ravichaganti.com/ebooks/AlaymansguidetoPowerShell2remotingv2.pdf) (PDF)
* [Layman’s Guide to PowerShell 2.0 remoting](https://ravichaganti.com/ebooks/AlaymansguidetoPowerShell2remotingv2.pdf) (PDF)
* [Learn PowerShell Core 6.0](https://www.packtpub.com/free-ebooks/learn-powershell-core-60) - David das Neves, Jan-Hendrik Peters (Packt account *required*)
* [Learn PowerShell Core 6.0](https://www.packtpub.com/free-ebooks/learn-powershell-core-60) - David das Neves, Jan-Hendrik Peters (Packt account *required*)
* [Learn PowerShell in Y Minutes](https://learnxinyminutes.com/docs/powershell/)
* [Learn PowerShell in Y Minutes](https://learnxinyminutes.com/docs/powershell/)
@ -1856,6 +1878,7 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
* [Data Structures and Algorithms in Python](https://web.archive.org/web/20161016153130/http://www.brpreiss.com/books/opus7/html/book.html) - B. R. Preiss (PDF)
* [Data Structures and Algorithms in Python](https://web.archive.org/web/20161016153130/http://www.brpreiss.com/books/opus7/html/book.html) - B. R. Preiss (PDF)
* [Dive into Python 3](https://diveintopython3.problemsolving.io) - Mark Pilgrim (3.0)
* [Dive into Python 3](https://diveintopython3.problemsolving.io) - Mark Pilgrim (3.0)
* [Dive into Python](https://linux.die.net/diveintopython/html/toc/index.html) - Mark Pilgrim (2.3)
* [Dive into Python](https://linux.die.net/diveintopython/html/toc/index.html) - Mark Pilgrim (2.3)
* [Essential Python](https://www.programming-books.io/essential/python/) - Krzysztof Kowalczyk, StackOverflow Contributors
* [From Python to NumPy](https://www.labri.fr/perso/nrougier/from-python-to-numpy/) - Nicolas P. Rougier (3.6)
* [From Python to NumPy](https://www.labri.fr/perso/nrougier/from-python-to-numpy/) - Nicolas P. Rougier (3.6)
* [Full Stack Python](https://www.fullstackpython.com) - Matt Makai
* [Full Stack Python](https://www.fullstackpython.com) - Matt Makai
* [Functional Programming in Python](https://www.oreilly.com/ideas/functional-programming-in-python) - David Mertz
* [Functional Programming in Python](https://www.oreilly.com/ideas/functional-programming-in-python) - David Mertz
@ -2071,6 +2094,7 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE