## BY SUBJECT

This list, organized by subject, is for books that cover a programming-related subject in a programming-language agnostic way.  
Books that cover a specific programming language can be found in the  [BY PROGRAMMING LANGUAGE](free-programming-books-langs.md) list.


### Index

* [0 - Meta-Lists](#0---meta-lists)
* [Algorithms & Data Structures](#algorithms--data-structures)
* [Artificial Intelligence](#artificial-intelligence)
* [Blockchain](#blockchain)
* [Cellular Automata](#cellular-automata)
* [Cloud Computing](#cloud-computing)
* [Competitive Programming](#competitive-programming)
* [Compiler Design](#compiler-design)
* [Computer Organization and Architecture](#computer-organization-and-architecture)
* [Computer Science](#computer-science)
* [Computer Vision](#computer-vision)
* [Containers](#containers)
* [Database](#database)
* [Datamining](#datamining)
* [Game Development](#game-development)
* [Graphical user interfaces](#graphical-user-interfaces)
* [Graphics Programming](#graphics-programming)
* [Information Retrieval](#information-retrieval)
* [Licensing](#licensing)
* [Machine Learning](#machine-learning)
* [Mathematics](#mathematics)
* [Mathematics For Computer Science](#mathematics-for-computer-science)
* [Misc](#misc)
* [Networking](#networking)
* [Open Source Ecosystem](#open-source-ecosystem)
* [Operating Systems](#operating-systems)
* [Parallel Programming](#parallel-programming)
* [Partial Evaluation](#partial-evaluation)
* [Professional Development](#professional-development)
* [Programming Paradigms](#programming-paradigms)
* [Regular Expressions](#regular-expressions)
* [Reverse Engineering](#reverse-engineering)
* [Search Engines](#search-engines)
* [Security](#security)
* [Software Architecture](#software-architecture)
* [Standards](#standards)
* [Theoretical Computer Science](#theoretical-computer-science)
* [Web Performance](#web-performance)
* [Web Services](#web-services)
* [Workflow](#workflow)


### 0 - Meta-Lists

* [atariarchives.org](http://www.atariarchives.org) atariarchives.org makes books, information, and software for Atari and other classic computers available on the Web.
* [Bento](https://www.bento.io)
* [Bitsavers.org](http://bitsavers.trailing-edge.com)
* [Code Catalog: A Collection of Code Examples from Prominent Open Source Projects](https://codecatalog.org) (HTML)
* [conceptf1.blogspot.com](http://conceptf1.blogspot.com/2013/11/list-of-freely-available-programming.html)
* [Free Smalltalk Books, collected by Stéphane Ducasse](http://stephane.ducasse.free.fr/FreeBooks.html)
* [Free Tech Books](http://www.freetechbooks.com)
* [Goalkicker](https://goalkicker.com) - Programming Notes for Professionals books
* [IBM Redbooks](http://www.redbooks.ibm.com)
* [InfoQ Minibooks](http://www.infoq.com/minibooks/)
* [InTech: Computer and Information Science](http://www.intechopen.com/subjects/computer-and-information-science)
* [JSBooks - directory of free javascript ebooks](https://github.com/revolunet/JSbooks)
* [Learn X in Y minutes](https://learnxinyminutes.com)
* [Learneroo Resources to Learn Programming](https://www.learneroo.com/modules/12/nodes/96)
* [Microsoft Guides to Software](https://blogs.msdn.microsoft.com/mssmallbiz/2014/07/07/largest-collection-of-free-microsoft-ebooks-ever-including-windows-8-1-windows-8-windows-7-office-2013-office-365-office-2010-sharepoint-2013-dynamics-crm-powershell-exchange-server-lync-2/)
* [Microsoft Press: Free E-Books](https://mva.microsoft.com/ebooks)
* [Microsoft Technologies 1, including books on Windows Azure, SharePoint, Visual Studio Guide, Windows phone development, ASP.net, Office365, etc. collection by Eric Ligman](https://blogs.msdn.microsoft.com/mssmallbiz/2012/07/27/large-collection-of-free-microsoft-ebooks-for-you-including-sharepoint-visual-studio-windows-phone-windows-8-office-365-office-2010-sql-server-2012-azure-and-more/)
* [Microsoft Technologies 2, including books on Windows Azure, SharePoint, Visual Studio Guide, Windows phone development, ASP.net, etc. collection by Eric Ligman](https://blogs.msdn.microsoft.com/mssmallbiz/2012/07/30/another-large-collection-of-free-microsoft-ebooks-and-resource-kits-for-you-including-sharepoint-2013-office-2013-office-365-duet-2-0-azure-cloud-windows-phone-lync-dynamics-crm-and-more/)
* [O'Reilly's Open Books Project](http://www.oreilly.com/openbook/)
* [Papers we love](https://github.com/papers-we-love/papers-we-love)
* [Programming](https://en.wikibooks.org/wiki/Category%3aComputer_programming) - Wikibooks
* [Red Gate Books](http://www.red-gate.com/community/books/index)
* [Rip Tutorials](https://riptutorial.com/ebook)
* [Stef's Free Online Smalltalk Books](http://stephane.ducasse.free.fr/FreeBooks/)
* [TechBeamers.com](http://www.techbeamers.com)
* [TechBooksForFree.com](http://www.techbooksforfree.com)
* [The Definitive C++ Book Guide and List](http://stackoverflow.com/questions/388242/the-definitive-c-book-guide-and-list)
* [Theassayer.org](http://theassayer.org)
* [tutorialspoint](http://www.tutorialspoint.com)


### Algorithms & Data Structures

* [A Field Guide To Genetic Programming](https://web.archive.org/web/20191020195105/http://www0.cs.ucl.ac.uk/staff/W.Langdon/ftp/papers/poli08_fieldguide.pdf) - Riccardo Poli et al. (PDF)
* [Algorithm Design](https://archive.org/details/AlgorithmDesign1stEditionByJonKleinbergAndEvaTardos2005PDF) - Jon Kleinberg and Éva Tardos (PDF)
* [Algorithmic Graph Theory](http://code.google.com/p/graphbook/)
* [Algorithms](https://en.wikibooks.org/wiki/Algorithms) - Wikibooks
* [Algorithms, 4th Edition](http://algs4.cs.princeton.edu/home/) - Robert Sedgewick and Kevin Wayne
* [Algorithms and Automatic Computing Machines (1963)](https://archive.org/details/Algorithms_And_Automatic_Computing_Machines) - B. A. Trakhtenbrot
* [Algorithms and Complexity](https://www.math.upenn.edu/~wilf/AlgoComp.pdf) - Herbert S. Wilf (PDF)
* [Algorithms Course Materials](http://jeffe.cs.illinois.edu/teaching/algorithms/) - Jeff Erickson
* [Algorithms Notes for Professionals](https://goalkicker.com/AlgorithmsBook) - Compiled from StackOverflow Documentation (PDF)
* [Analysis and Design of Algorithms](http://www.cse.iitd.ernet.in/~ssen/csl356/admin356.html) - Sandeep Sen, IIT Delhi
* [Animated Algorithm and Data Structure Visualization](http://visualgo.net) (Resource)
* [Annotated Algorithms in Python: Applications in Physics, Biology, and Finance](https://github.com/mdipierro/nlib) - Massimo di Pierro
* [Binary Trees](http://cslibrary.stanford.edu/110/BinaryTrees.pdf) (PDF)
* [Data Structures](https://adityacse.weebly.com/uploads/2/4/0/7/24078687/data-structures.pdf) - Aditya CSE (PDF)
* [Data Structures](https://en.wikibooks.org/wiki/Data_Structures) - Wikibooks
* [Data Structures](http://www.cse.iitd.ernet.in/~suban/cs130/index.html) - Prof. Subhashis Banerjee, IIT Delhi
* [Data Structures (Into Java) - Paul N. Hilfinger](http://www-inst.eecs.berkeley.edu/~cs61b/fa14/book2/data-structures.pdf) (PDF)
* [Data Structures and Algorithms: Annotated Reference with Examples](https://web.archive.org/web/20170715160229/http://dotnetslackers.com/Community/files/folders/data-structures-and-algorithms/entry30283.aspx) - G. Barnett and L. Del Tongo
* [Data Structures Succinctly Part 1, Syncfusion](https://www.syncfusion.com/resources/techportal/ebooks/datastructurespart1) (PDF, Kindle) (email address *requested*, not required)
* [Data Structures Succinctly Part 2, Syncfusion](https://www.syncfusion.com/resources/techportal/ebooks/datastructurespart2) (PDF, Kindle) (email address *requested*, not required)
* [Elementary Algorithms](https://github.com/liuxinyu95/AlgoXY) - Larry LIU Xinyu
* [Foundations of Computer Science](http://infolab.stanford.edu/~ullman/focs.html) - Al Aho and Jeff Ullman
* [Geometry Algorithms](http://geomalgorithms.com) - Dan Sunday
* [Lectures Notes on Algorithm Analysis and Computational Complexity (Fourth Edition)](http://ianparberry.com/books/free/license.html) - Ian Parberry (use form at bottom of license)
* [LEDA: A Platform for Combinatorial and Geometric Computing](http://people.mpi-inf.mpg.de/~mehlhorn/LEDAbook.html) - K. Mehlhorn et al.
* [Linked List Basics](http://cslibrary.stanford.edu/103/LinkedListBasics.pdf) (PDF)
* [Linked List Problems](http://cslibrary.stanford.edu/105/LinkedListProblems.pdf) (PDF)
* [Matters Computational: Ideas, Algorithms, Source Code](http://www.jjj.de/fxt/fxtbook.pdf) (PDF)
* [Open Data Structures: An Introduction](http://opendatastructures.org) - Pat Morin
* [Planning Algorithms](http://planning.cs.uiuc.edu)
* [Problems on Algorithms (Second Edition)](http://ianparberry.com/books/free/license.html) - Ian Parberry (use form at bottom of license)
* [Purely Functional Data Structures (1996)](https://web.archive.org/web/20210917054102/http://www.cs.cmu.edu/~rwh/theses/okasaki.pdf) - Chris Okasaki (PDF) *(:card_file_box: archived)*
* [Sequential and parallel sorting algorithms](http://www.inf.fh-flensburg.de/lang/algorithmen/sortieren/algoen.htm)
* [Text Algorithms](http://igm.univ-mlv.fr/~mac/REC/text-algorithms.pdf) (PDF)
* [The Algorithm Design Manual](http://www8.cs.umu.se/kurser/TDBAfl/VT06/algorithms/BOOK/BOOK/BOOK.HTM)
* [The Design of Approximation Algorithms](http://www.designofapproxalgs.com/book.pdf) (PDF)
* [The Great Tree List Recursion Problem](http://cslibrary.stanford.edu/109/TreeListRecursion.pdf) (PDF)
* [The Kademlia Protocol Succinctly](https://www.syncfusion.com/ebooks/kademlia_protocol_succinctly) - Marc Clifton
* [Think Complexity](https://greenteapress.com/wp/think-complexity-2e/) - Allen B. Downey (2nd Edition) (PDF, HTML)


### Artificial Intelligence

* [Artificial Intelligence for a Better Future: An Ecosystem Perspective on the Ethics of AI and Emerging Digital Technologies](https://link.springer.com/book/10.1007/978-3-030-69978-9) - Bernd Carsten Stahl (PDF)
* [Artificial Intelligence: Foundations of Computational Agents (2010), 1st Edition](https://artint.info/aifca1e.html) - David L. Poole, Alan K. Mackworth @ Cambridge University Press (HTML)
* [Artificial Intelligence: Foundations of Computational Agents (2017), 2nd Edition](https://artint.info) - David L. Poole, Alan K. Mackworth @ Cambridge University Press (HTML, Slides)
* [Introduction to Autonomous Robots](https://github.com/correll/Introduction-to-Autonomous-Robots/releases) - Nikolaus Correll (PDF)
* [On the Path to AI: Law’s prophecies and the conceptual foundations of the machine learning age](https://link.springer.com/book/10.1007/978-3-030-43582-0) - Thomas D. Grant, Damon J. Wischik (PDF)
* [Probabilistic Programming & Bayesian Methods for Hackers](http://camdavidsonpilon.github.io/Probabilistic-Programming-and-Bayesian-Methods-for-Hackers/) - Cam Davidson-Pilon (HTML, Jupyter Notebook)
* [The Quest for Artificial Intelligence: A History of Ideas and Achievements](http://ai.stanford.edu/~nilsson/QAI/qai.pdf) - Nils J. Nilsson (PDF)


### Blockchain

* [Bitcoin and Cryptocurrency Technologies](http://bitcoinbook.cs.princeton.edu) - Arvind Narayanan, Joseph Bonneau, Edward Felten, Andrew Miller, Steven Goldfeder, Jeremy Clark (PDF)
* [Blockchain for Dummies, 2nd IBM Limited Edition](https://www.ibm.com/downloads/cas/36KBMBOG) - Manav Gupta (PDF)
* [chain.courses](https://chain.courses) - James Gan, Rishub Kumar
* [Getting Started with Enterprise Blockchain: A Guide to Design and Development](https://www.ibm.com/downloads/cas/RYWXAR0M) - Michael Bradley, David Gorman, Matt Lucas, Matthew Golby-Kirk (PDF)
* [Grokking Bitcoin](https://rosenbaum.se/book/) - Kalle Rosenbaum (HTML)
* [IBM Blockchain: The Founder’s Handbook, Third Edition](https://www.ibm.com/downloads/cas/GZPPMWM5) - Antonio Banda, Matthew Hamilton, Eileen Lowry, John Widdifield et al. (PDF)
* [Mastering Bitcoin - Unlocking digital currencies](https://github.com/bitcoinbook/bitcoinbook) - Andreas M. Antonopoulos
* [Playtime with Hyperledger Composer](https://schadokar.dev/ebooks/playtime-with-hyperledger-composer/) - Shubham Chadokar (PDF)


### Cellular Automata

* [A New Kind of Science](https://www.wolframscience.com/nksonline/toc.html) - Stephen Wolfram


### Cloud Computing

* [AWS Well-Architected Framework](https://docs.aws.amazon.com/wellarchitected/latest/framework) (PDF, HTML)
* [Azure for Architects, Third Edition](https://azure.microsoft.com/en-us/resources/azure-for-architects/) (PDF) *(email address or account required)*
* [Azure Functions Succinctly, Syncfusion](https://www.syncfusion.com/ebooks/azure-functions-succinctly) (PDF, Kindle) (email address requested, not required)
* [Building Serverless Applications with Google Cloud Run](https://www.cockroachlabs.com/guides/oreilly-building-serverless-applications-with-google-cloud-run/) - Wietse Venema (PDF) (email address requested, not required)
* [Cloud Computing for Science and Engineering](https://cloud4scieng.org/chapters/) - Ian Foster, Dennis B. Gannon (:construction: *in process*)
* [Cloud Design Patterns](https://docs.microsoft.com/en-us/azure/architecture/patterns/)
* [Designing Distributed Systems](https://azure.microsoft.com/en-us/resources/designing-distributed-systems/) *(account required)*
* [Distributed Systems 3rd edition](https://www.distributed-systems.net/index.php/books/ds3/) Maarten van Steen, Andrew S. Tanenbaum *(email address required)*
* [How to optimize storage costs using Amazon S3](https://aws.amazon.com/s3/cloud-storage-cost-optimization-ebook/) - AWS (PDF)
* [Kubernetes Hardening Guidance](https://media.defense.gov/2021/Aug/03/2002820425/-1/-1/1/CTR_KUBERNETESHARDENINGGUIDANCE.PDF) - NSA, CISA (PDF)
* [Learn Azure in a Month of Lunches](https://azure.microsoft.com/mediahandler/files/resourcefiles/learn-azure-in-a-month-of-lunches/Learn_Azure_in_a_Month_of_Lunches.pdf) - Iain Foulds (PDF)
* [Monitoring Modern Infrastructure](https://www.datadoghq.com/ebook/monitoring-modern-infrastructure/) *(account required)*
* [Multi-tenant Applications for the Cloud, 3rd Edition](http://www.microsoft.com/en-us/download/details.aspx?id=29263)
* [OpenStack Operations Guide](https://docs.openstack.org/ops-guide/index.html)
* [Streamline microservice management with Istio Service Mesh](https://developers.redhat.com/books/introducing-istio-service-mesh-microservices/) *(account required)*
* [The Developer’s Guide to Azure](https://azure.microsoft.com/en-us/campaigns/developer-guide/)


### Competitive Programming

* [Competitive Programmer's Handbook](https://cses.fi/book/book.pdf) - Antti Laaksonen (PDF)
* [Competitive Programming, 1st Edition](https://cpbook.net/#CP1details) - Steven Halim [(PDF)](https://www.comp.nus.edu.sg/~stevenha/myteaching/competitive_programming/cp1.pdf)
* [Competitive Programming, 2nd Edition](https://cpbook.net/#CP2details) - Steven Halim [(PDF)](https://www.comp.nus.edu.sg/~stevenha/myteaching/competitive_programming/cp2.pdf)
* [Principles of Algorithmic Problem Solving](http://www.csc.kth.se/~jsannemo/slask/main.pdf) - Johan Sannemo (PDF)


### Compiler Design

* [An Introduction to GCC](https://web.archive.org/web/20170326232435/http://www.network-theory.co.uk/docs/gccintro/index.html) - Brian Gough
* [Basics of Compiler Design (Anniversary Edition)](http://www.diku.dk/~torbenm/Basics/) - Torben Mogensen
* [Compiler Design in C (1990)](http://www.holub.com/software/compiler.design.in.c.html) - Allen Holub, Prentice Hall
* [Compiler Design: Theory, Tools, and Examples, C/C++ Edition](http://elvis.rowan.edu/~bergmann/books/Compiler_Design/c_cpp/Text/C_CppEd.pdf) - Seth D. Bergmann (PDF)
* [Compiler Design: Theory, Tools, and Examples, Java Edition](http://elvis.rowan.edu/~bergmann/books/Compiler_Design/java/CompilerDesignBook.pdf) - Seth D. Bergmann (PDF)
* [Compiling Scala for the Java Virtual Machine](http://lampwww.epfl.ch/~schinz/thesis-final-A4.pdf) - Michel Schinz (PDF)
* [Compiling Techniques (1969)](http://www.chilton-computing.org.uk/acl/literature/books/compilingtechniques/overview.htm) - F.R.A. Hopgood, Macdonald
* [Crafting Interpreters](http://www.craftinginterpreters.com) - Bob Nystrom (HTML)
* [Implementing Functional Languages: A Tutorial](http://research.microsoft.com/en-us/um/people/simonpj/Papers/pj-lester-book/) - Simon Peyton Jones, David Lester
* [Introduction to Compilers and Language Design](https://www3.nd.edu/~dthain/compilerbook/compilerbook.pdf) - Douglas Thain (PDF)
* [Let's Build a Compiler](http://www.stack.nl/~marcov/compiler.pdf) (PDF)
* [Practical and Theoretical Aspects of Compiler Construction](http://web.stanford.edu/class/archive/cs/cs143/cs143.1128/) (class lectures and slides)
* [The ANTLR Mega Tutorial](https://tomassetti.me/antlr-mega-tutorial/)


### Computer Organization and Architecture

* [Basic Computer Architecture](https://www.cse.iitd.ac.in/~srsarangi/archbooksoft.html) - Smruti R. Sarangi (HTML, PDF, Slides, Videos)
* [Computer Organization and Design Fundamentals](https://faculty.etsu.edu/tarnoff/138292) - David Tarnoff (PDF)


### Computer Science

* [Computational Thinking](https://www.cs.cmu.edu/~15110-s13/Wing06-ct.pdf) - Jeannette Wing, Carnegie-Mellon University (PDF)
* [Computer Science I - Draft](https://bitbucket.org/chrisbourke/computersciencei/src) - Dr. Chris Bourke (PDF) (:construction: *in process*)
* [Computer Science II - Draft](http://cse.unl.edu/~cbourke/ComputerScienceTwo.pdf) - Dr. Chris Bourke (PDF) (:construction: *in process*)
* [CS Principles: Big Ideas in Programming](https://www.openbookproject.net/books/StudentCSP/) - Mark Guzdial and Barbara Ericson (HTML)
* [What to Look for in a Code Review](https://leanpub.com/whattolookforinacodereview) - Trisha Gee (HTML, PDF, EPUB, Kindle) *(Leanpub account or valid email requested)*
* [Your First Year in Code](https://leanpub.com/firstyearincode) - Isaac Lyman (HTML, PDF, EPUB, Kindle) *(Leanpub account or valid email requested)*


### Computer Vision

* [Computer Vision](http://homepages.inf.ed.ac.uk/rbf/BOOKS/BANDB/bandb.htm) - Dana Ballard, Chris Brown
* [Computer Vision: Algorithms and Applications](http://szeliski.org/Book/) - Richard Szeliski
* [Computer Vision: Models, Learning, and Inference](http://www.computervisionmodels.com) - Simon J.D. Prince
* [Programming Computer Vision with Python](http://programmingcomputervision.com) - Jan Erik Solem


### Containers

* [CI/CD for Monorepos: Effectively building, testing, and deploying code with monorepos](https://github.com/semaphoreci/book-monorepo-cicd) - Pablo Tomas Fernandez Zavalia, Marko Anastasov, SemaphoreCI (PDF, EPUB, Kindle)
* [CI/CD with Docker and Kubernetes Book](https://github.com/semaphoreci/book-cicd-docker-kubernetes) - Marko Anastasov, Jérôme Petazzoni, Pablo Tom F. Zavalia, SemaphoreCI (PDF, EPUB, Kindle)
* [Docker Jumpstart](http://odewahn.github.io/docker-jumpstart/) - Andrew Odewahn
* [Kubernetes Deployment & Security Patterns](https://resources.linuxfoundation.org/LF+Projects/CNCF/TheNewStack_Book2_KubernetesDeploymentAndSecurityPatterns.pdf) - Alex Williams (PDF)
* [Kubernetes for Full-Stack Developers](https://www.digitalocean.com/community/curriculums/kubernetes-for-full-stack-developers) - Jamon Camisso, Hanif Jetha, Katherine Juell (PDF, EPUB)
* [Uncomplicating Kubernetes](https://livro.descomplicandokubernetes.com.br/en/) - Jeferson Fernando


### Database

* [Database Design – 2nd Edition](https://opentextbc.ca/dbdesign01/) - Adrienne Watt, Nelson Eng @ BCcampus Open Pressbooks (HTML, PDF, EPUB, Kindle)
* [Database Explorations](http://www.dcs.warwick.ac.uk/~hugh/TTM/Database-Explorations-revision-2.pdf) (PDF)
* [Database Fundamentals](http://public.dhe.ibm.com/software/dw/db2/express-c/wiki/Database_fundamentals.pdf) (PDF)
* [Databases, Types, and The Relational Model: The Third Manifesto](http://www.dcs.warwick.ac.uk/~hugh/TTM/DTATRM.pdf) (PDF)
* [Foundations of Databases](http://webdam.inria.fr/Alice/)
* [Readings in Database Systems, 5th Ed.](http://www.redbook.io)
* [Temporal Database Management](http://people.cs.aau.dk/~csj/Thesis/) - Christian S. Jensen
* [The Theory of Relational Databases](http://web.cecs.pdx.edu/~maier/TheoryBook/TRD.html)


### Datamining

* [A Programmer's Guide to Data Mining](http://guidetodatamining.com) - Ron Zacharski (Draft)
* [Data Jujitsu: The Art of Turning Data into Product](http://www.oreilly.com/data/free/data-jujitsu.csp) (email address *requested*, not required)
* [Data Mining Algorithms In R](https://en.wikibooks.org/wiki/Data_Mining_Algorithms_In_R) - Wikibooks
* [Elements of Data Science](https://allendowney.github.io/ElementsOfDataScience/README.html) - Allen B. Downey
* [Internet Advertising: An Interplay among Advertisers, Online Publishers, Ad Exchanges and Web Users](http://arxiv.org/pdf/1206.1754v2.pdf) (PDF)
* [Introduction to Data Science](https://docs.google.com/file/d/0B6iefdnF22XQeVZDSkxjZ0Z5VUE/edit?pli=1) - Jeffrey Stanton
* [Introduction to Data Science](https://leanpub.com/datasciencebook) - Rafael A Irizarry *(Leanpub account or valid email requested)*
* [Mining of Massive Datasets](http://infolab.stanford.edu/~ullman/mmds/book.pdf) - Jure Leskovec, Anand Rajaraman, Jeffrey D. Ullman (PDF)
* [School of Data Handbook](http://schoolofdata.org/handbook/)
* [Statistical inference for data science](https://leanpub.com/LittleInferenceBook/read) - Brian Caffo
* [The Ultimate Guide to 12 Dimensionality Reduction Techniques (with Python codes)](https://www.analyticsvidhya.com/blog/2018/08/dimensionality-reduction-techniques-python/) - Pulkit Sharma
* [Theory and Applications for Advanced Text Mining](http://www.intechopen.com/books/theory-and-applications-for-advanced-text-mining)


### Game Development

* [2D Game Development: From Zero To Hero](https://github.com/Penaz91/2DGD_F0TH) - Daniele Penazzo (HTML, [PDF, EBPUB, Kindle...](https://therealpenaz91.itch.io/2dgd-f0th#download)) (:construction: *in process*)
* [Coding With Minecraft](https://turtleappstore.com/book/) - Al Sweigart
* [Designing Virtual Worlds](https://mud.co.uk/richard/DesigningVirtualWorlds.pdf) - Richard A. Bartle (PDF)
* [Game AI Pro](http://www.gameaipro.com) - Steve Rabin
* [Game Design with AGS](https://ensadi.github.io/AGSBook/) - Dave Ensminger, A. G. Madi
* [Game Programming Patterns](http://gameprogrammingpatterns.com) - Bob Nystrom
* [Procedural Content Generation in Games](http://pcgbook.com) - Noor Shaker, Julian Togelius, Mark Nelson


### Graphics Programming

* [3D Game Shaders For Beginners](https://github.com/lettier/3d-game-shaders-for-beginners) - David Lettier (Git) [(HTML)](https://lettier.github.io/3d-game-shaders-for-beginners)
* [Blender 3D: Noob to Pro](https://en.wikibooks.org/wiki/Blender_3D%3A_Noob_to_Pro) - Wikibooks
* [Blender Manual](https://docs.blender.org/manual/en/latest)
* [Computer Graphics from scratch](http://gabrielgambetta.com/computer-graphics-from-scratch) - Gabriel Gambetta (:construction: *in process*)
* [DirectX manual](http://user.xmission.com/~legalize/book/download/index.html) (draft)
* [GPU Gems](https://developer.nvidia.com/gpugems/GPUGems/gpugems_pref01.html)
* [Graphics Programming Black Book](http://www.gamedev.net/page/resources/_/technical/graphics-programming-and-theory/graphics-programming-black-book-r1698) - Michael Abrash
* [Introduction to Modern OpenGL](https://open.gl) - Alexander Overvoorde (HTML, EPUB, PDF) (C++)
* [Introduction to TouchDesigner 099](https://leanpub.com/introductiontotouchdesigner/) *(Leanpub account or valid email requested)*
* [Learn Computer Graphics From Scratch!](https://www.scratchapixel.com) - Scratchapixel (:construction: *in process*)
* [Learn OpenGL](http://learnopengl.com) - Joey de Vries
* [Learn OpenGL RS](https://github.com/bwasty/learn-opengl-rs) - Benjamin Wasty et al. (:construction: *in process*) (Rust)
* [Learning Modern 3D Graphics Programming](https://web.archive.org/web/20150225192611/http://www.arcsynthesis.org/gltut/index.html) - Jason L. McKesson (draft)
* [Notes for a Computer Graphics Programming Course](https://www.cs.csustan.edu/~rsc/CS3600F00/Notes.pdf) - Dr. Steve Cunningham (PDF)
* [OpenGL](http://www.songho.ca/opengl/index.html) - Concepts and illustrations.
* [Ray Tracing in One Weekend](https://raytracing.github.io) - Peter Shirley (HTML)
* [ShaderX series](http://www.realtimerendering.com/resources/shaderx/) - Wolfgang Engel
* [Tutorials for modern OpenGL](http://www.opengl-tutorial.org)
* [WebGL Insights](http://webglinsights.com) - Patrick Cozzi and Contributors


### Graphical User Interfaces

* [Event-Driven GTK by Example — 2021 Edition](https://mmstick.github.io/gtkrs-tutorials/) - Michael Murphy
* [Programming with gtkmm 4](https://developer.gnome.org/gtkmm-tutorial/stable/)
* [Search User Interfaces](http://searchuserinterfaces.com/book/) - Marti A. Hearst
* [The GLib/GTK+ Development Platform](https://people.gnome.org/~swilmet/glib-gtk-dev-platform.pdf) - Sébastien Wilmet (PDF)
* [Web Design Primer](https://pressbooks.library.ryerson.ca/webdesign/) - Richard Adams, Ahmed Sagarwala
* [Web Style Guide Online](https://www.webstyleguide.com/wsg3/index.html) - Patrick J. Lynch and Sarah Horton


### Information Retrieval

* [Information Retrieval: A Survey](http://www.csee.umbc.edu/csee/research/cadip/readings/IR.report.120600.book.pdf) (PDF)
* [Introduction to Information Retrieval](http://nlp.stanford.edu/IR-book/information-retrieval-book.html)


### Licensing

* [Creative Commons: a user guide](http://www.aliprandi.org/cc-user-guide/) - Simone Aliprandi
* [Open Source Licensing Software Freedom and Intellectual Property Law](http://rosenlaw.com/oslbook/) - Lawrence Rosen
* [The Public Domain: Enclosing the Commons of the Mind](http://www.thepublicdomain.org/download/) - James Boyle


### Machine Learning

* [A Brief Introduction to Machine Learning for Engineers](https://arxiv.org/pdf/1709.02840.pdf) - Osvaldo Simeone (PDF)
* [A Brief Introduction to Neural Networks](http://www.dkriesel.com/en/science/neural_networks)
* [A Comprehensive Guide to Machine Learning](https://www.eecs189.org/static/resources/comprehensive-guide.pdf) - Soroush Nasiriany, Garrett Thomas, William Wang, Alex Yang (PDF)
* [A Course in Machine Learning](http://ciml.info/dl/v0_9/ciml-v0_9-all.pdf) (PDF)
* [A First Encounter with Machine Learning](https://web.archive.org/web/20210420163002/https://www.ics.uci.edu/~welling/teaching/ICS273Afall11/IntroMLBook.pdf) - Max Welling (PDF) *(:card_file_box: archived)*
* [A Selective Overview of Deep Learning](https://arxiv.org/abs/1904.05526) - Fan, Ma, and Zhong (PDF)
* [Algorithms for Reinforcement Learning](https://sites.ualberta.ca/~szepesva/papers/RLAlgsInMDPs.pdf) - Csaba Szepesvári (PDF)
* [An Introduction to Statistical Learning](https://web.stanford.edu/~hastie/ISLR2/ISLRv2_website.pdf) - Gareth James, Daniela Witten, Trevor Hastie and Robert Tibshirani (PDF)
* [Approaching Almost Any Machine Learning Problem](https://github.com/abhishekkrthakur/approachingalmost) - Abhishek Thakur (PDF)
* [Bayesian Reasoning and Machine Learning](http://web4.cs.ucl.ac.uk/staff/D.Barber/pmwiki/pmwiki.php?n=Brml.HomePage)
* [Deep Learning](http://www.deeplearningbook.org) - Ian Goodfellow, Yoshua Bengio and Aaron Courville
* [Deep Learning for Coders with Fastai and PyTorch](https://github.com/fastai/fastbook) - Jeremy Howard, Sylvain Gugger (Jupyter Notebooks)
* [Deep Learning with PyTorch](https://pytorch.org/assets/deep-learning/Deep-Learning-with-PyTorch.pdf) - Eli Stevens, Luca Antiga, Thomas Viehmann (PDF)
* [Dive into Deep Learning](http://d2l.ai)
* [Explorations in Parallel Distributed Processing: A Handbook of Models, Programs, and Exercises](https://web.stanford.edu/group/pdplab/pdphandbook) - James L. McClelland
* [Foundations of Machine Learning, Second Edition](https://mitpress.ublish.com/ereader/7093/?preview=#page/Cover) - Mehryar Mohri, Afshin Rostamizadeh, Ameet Talwalkar
* [Free and Open Machine Learning](https://nocomplexity.com/documents/fossml/) - Maikel Mardjan (HTML)
* [Gaussian Processes for Machine Learning](http://www.gaussianprocess.org/gpml/)
* [IBM Machine Learning for Dummies](https://www.ibm.com/downloads/cas/GB8ZMQZ3) - Judith Hurwitz, Daniel Kirsch
* [Information Theory, Inference, and Learning Algorithms](http://www.inference.phy.cam.ac.uk/itila/)
* [Interpretable Machine Learning](https://christophm.github.io/interpretable-ml-book/) - Christoph Molnar
* [Introduction to CNTK Succinctly](https://www.syncfusion.com/ebooks/cntk_succinctly) - James McCaffrey
* [Introduction to Machine Learning](http://arxiv.org/abs/0904.3664v1) - Amnon Shashua
* [Keras Succinctly](https://www.syncfusion.com/ebooks/keras-succinctly) - James McCaffrey
* [Learn Tensorflow](https://bitbucket.org/hrojas/learn-tensorflow) - Jupyter Notebooks
* [Learning Deep Architectures for AI](https://mila.quebec/wp-content/uploads/2019/08/TR1312.pdf) (PDF)
* [Machine Learning](http://www.intechopen.com/books/machine_learning)
* [Machine Learning for Data Streams](https://moa.cms.waikato.ac.nz/book-html/) - Albert Bifet, Ricard Gavaldà, Geoff Holmes, Bernhard Pfahringer
* [Machine Learning from Scratch](https://dafriedman97.github.io/mlbook/) - Danny Friedman (HTML, PDF, Jupyter Book)
* [Machine Learning, Neural and Statistical Classification](http://www1.maths.leeds.ac.uk/~charles/statlog/)
* [Machine Learning with Python](https://www.tutorialspoint.com/machine_learning_with_python) - Tutorials Point (HTML, [PDF](https://www.tutorialspoint.com/machine_learning_with_python/machine_learning_with_python_tutorial.pdf))
* [Mathematics for Machine Learning](https://gwthomas.github.io/docs/math4ml.pdf) - Garrett Thomas (PDF)
* [Mathematics for Machine Learning](https://mml-book.github.io) - Marc Peter Deisenroth, A Aldo Faisal, and Cheng Soon Ong
* [Neural Networks and Deep Learning](http://neuralnetworksanddeeplearning.com)
* [Practitioners guide to MLOps](https://services.google.com/fh/files/misc/practitioners_guide_to_mlops_whitepaper.pdf) - Khalid Samala, Jarek Kazmierczak, Donna Schut (PDF)
* [Probabilistic Models in the Study of Language](http://idiom.ucsd.edu/~rlevy/pmsl_textbook/text.html) (Draft, with R code)
* [Python Machine Learning Projects](https://www.digitalocean.com/community/books/python-machine-learning-projects-a-digitalocean-ebook) - Lisa Tagliaferri, Brian Boucheron, Michelle Morales, Ellie Birkbeck, Alvin Wan (PDF, EPUB, Kindle)
* [Reinforcement Learning: An Introduction](http://incompleteideas.net/book/RLbook2020.pdf) - Richard S. Sutton, Andrew G. Barto (PDF)
* [Speech and Language Processing (3rd Edition Draft)](https://web.stanford.edu/~jurafsky/slp3/ed3book.pdf) - Daniel Jurafsky, James H. Martin (PDF)
* [The Elements of Statistical Learning](https://web.stanford.edu/~hastie/ElemStatLearn/) - Trevor Hastie, Robert Tibshirani, and Jerome Friedman
* [The LION Way: Machine Learning plus Intelligent Optimization](https://intelligent-optimization.org/LIONbook/lionbook_3v0.pdf) - Roberto Battiti, Mauro Brunato (PDF)
* [The Mechanics of Machine Learning](https://mlbook.explained.ai) - Terence Parr and Jeremy Howard
* [The Python Game Book](http://thepythongamebook.com/en%3Astart)
* [Top 10 Machine Learning Algorithms Every Engineer Should Know](https://www.dezyre.com/article/top-10-machine-learning-algorithms/202) - Binny Mathews and Omair Aasim
* [Understanding Machine Learning: From Theory to Algorithms](https://www.cs.huji.ac.il/~shais/UnderstandingMachineLearning) - Shai Shalev-Shwartz, Shai Ben-David


### Mathematics

* [A Computational Introduction to Number Theory and Algebra](https://shoup.net/ntb/) - Victor Shoup
* [A Computational Logic (1979)](https://www.cs.utexas.edu/users/boyer/acl.pdf) - Robert S. Boyer and J Strother Moore (PDF)
* [A First Course in Complex Analysis](http://math.sfsu.edu/beck/complex.html) - Matthias Beck, Gerald Marchesi, Dennis Pixton, Lucas Sabalka
* [A First Course in Linear Algebra](http://linear.ups.edu) - Rob Beezer
* [A Friendly Introduction to Mathematical Logic](https://milneopentextbooks.org/a-friendly-introduction-to-mathematical-logic/) - Christopher C. Leary and Lars Kristiansen
* [A Gentle Introduction to the Art of Mathematics](https://osj1961.github.io/giam/) - Joseph E. Fields
* [A Programmer's Introduction to Mathematics](https://pimbook.org) - Jeremy Kun
* [Abstract Algebra: Theory and Applications](http://abstract.ups.edu) - Tom Judson
* [Active Calculus](https://scholarworks.gvsu.edu/books/20/) - Matt Boelkins
* [Advanced Algebra](http://www.math.stonybrook.edu/~aknapp/download/a2-alg-inside.pdf) - Anthony W. Knapp (PDF)
* [Algebra: Abstract and Concrete](https://homepage.divms.uiowa.edu/~goodman/algebrabook.dir/algebrabook.html) - Frederick Goodman
* [Algebra: An Elementary Text-Book, Part I (1904)](http://djm.cc/library/Algebra_Elementary_Text-Book_Part_I_Chrystal_edited.pdf) - G. Chrystal (PDF)
* [Algebra: An Elementary Text-Book, Part II (1900)](http://djm.cc/library/Algebra_Elementary_Text-Book_Part_II_Chrystal_edited02.pdf) - G. Chrystal (PDF)
* [Algebraic Topology](https://pi.math.cornell.edu/~hatcher/AT/ATpage.html) - Allen Hatcher (PDF)
* [An Introduction to the Theory of Numbers](http://www.trillia.com/moser-number.html) - Leo Moser (PDF)
* [Analytic Geometry (1922)](http://djm.cc/library/Analytic_Geometry_Siceloff_Wentworth_Smith_edited.pdf) - Lewis Parker Siceloff, George Wentworth, David Eugene Smith (PDF)
* [APEX Calculus](https://www.apexcalculus.com) - Gregory Hartman, Brian Heinold, Troy Siemers, and Dimplekumar Chalishajar
* [Applied Combinatorics](https://rellek.net/book/app-comb.html) - Mitchel T. Keller and William T. Trotter
* [Applied Discrete Structures](https://faculty.uml.edu/klevasseur/ads2/) - Alan Doerr and Kenneth Levasseur
* [Basic Algebra](http://www.math.stonybrook.edu/~aknapp/download/b2-alg-inside.pdf) - Anthony W. Knapp (PDF)
* [Basic Analysis: Introduction to Real Analysis](https://www.jirka.org/ra/) - Jiří Lebl
* [Basics of Algebra, Topology, and Differential Calculus](http://www.cis.upenn.edu/~jean/math-basics.pdf) (PDF)
* [Bayesian Methods for Hackers](https://github.com/CamDavidsonPilon/Probabilistic-Programming-and-Bayesian-Methods-for-Hackers) - Cameron Davidson-Pilon
* [Beginning and Intermediate Algebra](http://www.wallace.ccfaculty.org/book/book.html) - Tyler Wallace
* [Book of Proof](https://www.people.vcu.edu/~rhammack/BookOfProof/) - Richard Hammack [(PDF)](https://www.people.vcu.edu/~rhammack/BookOfProof/Main.pdf)
* [Calculus](https://ocw.mit.edu/resources/res-18-001-calculus-online-textbook-spring-2005/textbook/) - Gilbert Strang
* [Calculus I](https://resolver.caltech.edu/CaltechBOOK:1985.001) - Jerrold E. Marsden and Alan Weinstein
* [Calculus in Context](http://www.math.smith.edu/~callahan/intromine.html) - James Callahan
* [Calculus Made Easy](http://www.gutenberg.org/ebooks/33283) - Silvanus P. Thompson (PDF)
* [Category Theory for the Sciences](https://mitpress.ublish.com/ereader/77/?preview#page/Cover) - David I. Spivak
* [CK-12 Probability and Statistics - Advanced](http://www.ck12.org/book/Probability-and-Statistics---Advanced-%2528Second-Edition%2529/)
* [CLP-1 Differential Calculus](https://www.math.ubc.ca/~CLP/CLP1/) - Joel Feldman, Andrew Rechnitzer, and Elyse Yeager
* [CLP-2 Integral Calculus](https://www.math.ubc.ca/~CLP/CLP2/) - Joel Feldman, Andrew Rechnitzer, and Elyse Yeager
* [CLP-3 Multivariable Calculus](https://www.math.ubc.ca/~CLP/CLP3/) - Joel Feldman, Andrew Rechnitzer, and Elyse Yeager
* [CLP-4 Vector Calculus](https://www.math.ubc.ca/~CLP/CLP4/) - Joel Feldman, Andrew Rechnitzer, and Elyse Yeager
* [Collaborative Statistics](http://cnx.org/contents/5e0744f9-9e79-4348-9237-ed012213a2d6%4040.9)
* [College Trigonometry](https://open.umn.edu/opentextbooks/textbooks/college-trigonometry) - Carl Stitz, Jeff Zeager (PDF)
* [Combinatorics Through Guided Discovery](https://bogart.openmathbooks.org) - Kenneth Bogart
* [Complex Analysis](https://people.math.gatech.edu/~cain/winter99/complex.html) - George Cain
* [Computational and Inferential Thinking. The Foundations of Data Science](https://www.inferentialthinking.com)
* [Computational Geometry](http://web.mit.edu/hyperbook/Patrikalakis-Maekawa-Cho/)
* [Computational Mathematics with SageMath](https://www.sagemath.org/sagebook/) - Paul Zimmermann, Alexandre Casamayou, Nathann Cohen, Guillaume Connan, et al. (PDF)
* [Concepts & Applications of Inferential Statistics](http://vassarstats.net/textbook/)
* [Convex Optimization](https://web.stanford.edu/~boyd/cvxbook) - Stephen Boyd and Lieven Vandenberghe
* [Coordinate Geometry (1911)](http://djm.cc/library/Coordinate_Geometry_Fine_Thompson_edited03.pdf) - Henry Buchard Fine and Henry Dallas Thompson (PDF)
* [Differential Equations](http://tutorial.math.lamar.edu/Classes/DE/DE.aspx) - Paul Dawkins (PDF, use download menu to download)
* [Differential Equations (1922)](http://djm.cc/library/Differential_Equations_Phillips_edited.pdf) - H. B. Phillips (PDF)
* [Discrete Mathematics: An Open Introduction](http://discrete.openmathbooks.org/dmoi3.html) - Oscar Levin
* [Discrete Mathematics: First and Second Course](https://cseweb.ucsd.edu/~gill/BWLectSite/) - Edward A. Bender and S. Gill Williamson
* [Elementary Differential Equations](http://ramanujan.math.trinity.edu/wtrench/texts/TRENCH_DIFF_EQNS_I.PDF) - William F. Trench (PDF)
* [Elementary Differential Equations (with Boundary Value Problems)](https://digitalcommons.trinity.edu/mono/9/) - William F. Trench
* [Elementary Number Theory: Primes, Congruences, and Secrets](https://wstein.org/ent/) - William Stein
* [Elementary Real Analysis](https://www.classicalrealanalysis.info/com/Elementary-Real-Analysis.php) - Brian S. Thomson, Judith B. Bruckner, Andrew M. Bruckner
* [Elements of Abstract and Linear Algebra](https://www.math.miami.edu/~ec/book/) - E. H. Connell
* [Elements of Differential and Integral Calculus (1911)](http://djm.cc/library/Elements_Differential_Integral_Calculus_Granville_edited_2.pdf) - William Anthony Granville (PDF)
* [Essentials of Metaheuristics](http://cs.gmu.edu/~sean/book/metaheuristics/) - Sean Luke
* [First Course in Algebra (1910)](http://djm.cc/library/First_Algebra_Hawkes_Luby_Touton_edited.pdf) - Herbert E. Hawkes, William A. Luby, Frank C. Touton (PDF)
* [Foundations of Combinatorics with Applications](https://www.math.ucsd.edu/~ebender/CombText/) - Edward A. Bender and S. Gill Williamson
* [Foundations of Constructive Probability Theory](https://arxiv.org/pdf/1906.01803.pdf) - Yuen-Kwok Chan (PDF)
* [Geometry with an Introduction to Cosmic Topology](https://mphitchman.com) - Michael P. Hitchman
* [Graph Theory](http://compalg.inf.elte.hu/~tony/Oktatas/TDK/FINAL/)
* [How We Got from There to Here: A Story of Real Analysis](https://milneopentextbooks.org/how-we-got-from-there-to-here-a-story-of-real-analysis/) - Robert Rogers and Eugene Boman
* [Introduction to Probability](https://www.dartmouth.edu/~chance/teaching_aids/books_articles/probability_book/book.html) - Charles M. Grinstead and J. Laurie Snell
* [Introduction to Probability and Statistics Spring 2014](http://ocw.mit.edu/courses/mathematics/18-05-introduction-to-probability-and-statistics-spring-2014/)
* [Introduction to Proofs](http://joshua.smcvt.edu/proofs/) - Jim Hefferon
* [Introduction to Real Analysis](https://digitalcommons.trinity.edu/mono/7/) - William F. Trench
* [Introduction to Statistical Thought](http://people.math.umass.edu/~lavine/Book/book.html) - Michael Lavine
* [Introductory Statistics for the Life and Biomedical Sciences](https://www.openintro.org/book/isrs/) - Julie Vu and David Harrington
* [Kalman and Bayesian Filters in Python](https://github.com/rlabbe/Kalman-and-Bayesian-Filters-in-Python)
* [Knapsack Problems - Algorithms and Computer Implementations](http://www.or.deis.unibo.it/knapsack.html) - Silvano Martello and Paolo Toth
* [Lecture Notes of Linear Algebra](http://home.iitk.ac.in/~psraj/mth102/lecture_notes.html) - Dr. P. Shunmugaraj, IIT Kanpur (PDF)
* [Lecture Notes on Linear Algebra](https://home.iitk.ac.in/~arlal/book/LA_Solution_Dec20.pdf) - Dr. Arbind K Lal, Sukant Pati (PDF) (:construction: *in process*)
* [Lies, Damned Lies, or Statistics: How to Tell the Truth with Statistics](https://www.poritz.net/jonathan/share/ldlos.pdf) - Jonathan A. Poritz (PDF)
* [Linear Algebra](https://www.math.ucdavis.edu/~linear/linear-guest.pdf) (PDF)
* [Linear Algebra](http://joshua.smcvt.edu/linearalgebra/) - Jim Hefferon
* [Linear Algebra Done Wrong](https://www.math.brown.edu/streil/papers/LADW/LADW.html) - Sergei Treil
* [Linear Algebra, Infinite Dimensions, and Maple](https://people.math.gatech.edu/~herod/Hspace/Hspace.html) - James Herod
* [Linear Methods of Applied Mathematics](http://www.mathphysics.com/pde) - Evans M. Harrell II and James V. Herod
* [Magic Squares and Cubes (1917)](http://djm.cc/library/Magic_Squares_Cubes_Andrews_edited.pdf) - W. S. Anderson (PDF)
* [Math in Society](https://www.opentextbookstore.com/mathinsociety/) - David Lippman
* [Mathematical Analysis I](http://www.trillia.com/zakon-analysisI.html) - Elias Zakon
* [Mathematical Discovery](https://classicalrealanalysis.info/com/Mathematical-Discovery.php) - Andrew M. Bruckner, Brian S. Thomson, and Judith B. Bruckner
* [Mathematical Logic - an Introduction](http://www.ii.uib.no/~michal/und/i227/book/book.pdf) (PDF)
* [Mathematical Reasoning: Writing and Proof](https://www.tedsundstrom.com/mathematical-reasoning-3) - Ted Sundstrom
* [Mathematics, MTH101A](http://home.iitk.ac.in/~psraj/mth101/) - P. Shunmugaraj, IIT Kanpur
* [Modern Statistics for Modern Biology](https://www.huber.embl.de/msmb) - Susan Holmes and Wolfgang Huber
* [Multivariable Calculus](https://people.math.gatech.edu/~cain/notes/calculus.html) - George Cain and James Herod
* [Non-Uniform Random Variate Generation](http://luc.devroye.org/rnbookindex.html) - Luc Devroye (PDF)
* [Notes on Diffy Qs](https://www.jirka.org/diffyqs/) - Jiří Lebl
* [Number Theory](https://github.com/holdenlee/number-theory) - Holden Lee MIT
* [Number Theory: In Context and Interactive](https://web.archive.org/web/20210711231452/https://math.gordon.edu/ntic/) - Karl-Dieter Crisman
* [Odds and Ends: Introducing Probability & Decision with a Visual Emphasis](https://jonathanweisberg.org/vip/) - Jonathan Weisberg
* [Online Statistics Education](http://onlinestatbook.com) - David Lane
* [OpenIntro Statistics](https://www.openintro.org/stat/textbook.php) - David M. Diez, Christopher D. Barr, Mine Çetinkaya-Rundel
* [ORCCA: Open Resources for Community College Algebra](https://spaces.pcc.edu/pages/viewpage.action?pageId=52729944) - Portland Community College
* [Ordinary Differential Equations](https://en.wikibooks.org/wiki/Ordinary_Differential_Equations) - Wikibooks
* [Paul's Online Notes: Algebra, Calculus I-III and Differential Equations](https://tutorial.math.lamar.edu) - Paul Dawkins @ Lamar University
* [Plane Geometry (1913)](http://djm.cc/library/Plane_Geometry_Wentworth_Smith_edited.pdf) - George Wentworth and David Eugene Smith (PDF)
* [Planes and Spherical Trigonometry (1915)](http://djm.cc/library/Plane_Spherical_Trigonometry_Wentworth_Smith_edited_2.pdf) - George Wentworth and David Eugene Smith (PDF)
* [Precalculus](https://stitz-zeager.com) - Carl Stitz and Jeff Zeager [(PDF)](https://stitz-zeager.com/szprecalculus07042013.pdf)
* [Probability and Statistics Cookbook](http://statistics.zone)
* [Probability and Statistics EBook](http://wiki.stat.ucla.edu/socr/index.php/Probability_and_statistics_EBook)
* [Probability: Lectures and Labs](https://www.markhuberdatascience.org/probability-textbook) - Mark Huber
* [Recreations in Math](http://djm.cc/library/Recreations_in_Mathematics_Licks_edited.pdf) - H. E. Licks (PDF)
* [Sage for Undergraduates](http://www.gregorybard.com/books.html) - Gregory Bard
* [Second Course in Algebra](http://djm.cc/library/Second_Algebra_Hawkes_Luby_Touton_edited.pdf) - Herbert E. Hawkes, William A. Luby, Frank C. Touton (PDF)
* [Seven Sketches in Compositionality: An Invitation to Applied Category Theory](https://arxiv.org/pdf/1803.05316.pdf) - Brendan Fong and David I. Spivak (PDF)
* [Statistical Thinking for the 21st Century](https://statsthinking21.org) - Russell A. Poldrack
* [Statistics Done Wrong](http://www.statisticsdonewrong.com) - Alex Reinhart
* [SticiGui](https://www.stat.berkeley.edu/~stark/SticiGui/) - Philip Stark
* [Tea Time Numerical Analysis](https://lqbrin.github.io/tea-time-numerical/) - Leon Q. Brin
* [The Elements of Data Analytic Style](https://leanpub.com/datastyle) - Jeff Leek (HTML, PDF, EPUB, Kindle) *(Leanpub account or valid email requested)*
* [The Open Logic Text](https://builds.openlogicproject.org/open-logic-complete.pdf) - Open Logic Project (PDF)
* [Think Bayes: Bayesian Statistics Made Simple](http://www.greenteapress.com/thinkbayes/) - Allen B. Downey
* [Think Stats: Probability and Statistics for Programmers](http://greenteapress.com/thinkstats/) - Allen B. Downey (using Python)
* [Vector Calculus](http://www.mecmath.net) - Michael Corral
* [Yet Another Introductory Number Theory Textbook](https://www.poritz.net/jonathan/share/yaintt.pdf) - Jonathan A. Poritz (PDF)


### Mathematics For Computer Science

* [A Mathematical Theory of Communication](https://archive.org/details/bstj27-4-623) - Claude E.Shannon
* [Discrete Structures for Computer Science: Counting, Recursion, and Probability](http://cglab.ca/~michiel/DiscreteStructures/) - Michiel Smid
* [Exploring Math for Programmers and Data Scientists](https://freecontent.manning.com/free-ebook-exploring-math-for-programmers-and-data-scientists/) - Paul Orland


### Misc

* [10 Keys to Great Landing Pages](https://ithemes.com/wp-content/uploads/downloads/2012/09/10-keys-to-great-landing-pages-eBook.pdf) - iThemes Media (PDF)
* [2016 European Software Development Salary Survey](https://www.oreilly.com/radar/2016-european-software-development-salary-survey/)
* [2016 Software Development Salary Survey](https://www.oreilly.com/radar/2016-software-development-salary-survey-report/)
* [97 Things Every Programmer Should Know - Extended](https://leanpub.com/97-Things-Every-Programmer-Should-Know-Extended) *(Leanpub account or valid email requested)*
* [A MACHINE MADE THIS BOOK ten sketches of computer science](http://ocaml-book.com/s/popbook.pdf) - JOHN WHITINGTON (PDF)
* [Ansible Up & Running (first three chapters)](https://www.ansible.com/ebooks) *(account required)*
* [Asterisk™: The Definitive Guide](http://solmu.org/pub/help/Asterisk/3nd_Edition_for_Asterisk_1.8)
* [Barcode Overview](http://www.tec-it.com/download/PDF/Barcode_Reference_EN.pdf) (PDF)
* [Come, Let's Play: Scenario-Based Programming Using Live Sequence Charts](http://www.wisdom.weizmann.ac.il/~playbook/)
* [Communicating Sequential Processes](http://www.usingcsp.com/cspbook.pdf) - Tony Hoare (PDF)
* [Confessions of an Unintentional CTO: Lessons in Growing a Web App](http://www.jackkinsella.ie/books/confessions_of_an_unintentional_cto) - Jack Kinsella
* [Culture \& Empire: Digital Revolution](http://hintjens.com/books) (PDF)
* [Design With FontForge](http://designwithfontforge.com/en-US/index.html)
* [Designing Interfaces](http://designinginterfaces.com) - Jennifer Tidwell
* [DevDocs](http://devdocs.io) - Documents for Developers in 1 place
* [DevOps For Dummies (IBM Edition)](http://www.ibm.com/ibm/devops/us/en/resources/dummiesbooks/) (PDF)
* [Digital Signal Processing For Communications](http://www.sp4comm.org)
* [Digital Signal Processing For Engineers and Scientists](http://www.dspguide.com)
* [Digital Signal Processing in Python](https://greenteapress.com/wp/think-dsp) - Allen B. Downey
* ["DYNAMIC LINKED LIBRARIES": Paradigms of the GPL license in contemporary software](http://www.lulu.com/shop/http://www.lulu.com/shop/luis-enr%C3%ADquez-a/dynamic-linked-libraries-paradigms-of-the-gpl-license-in-contemporary-software/ebook/product-21419788.html) - Luis A. Enríquez
* [Essential Image Optimization](https://images.guide) - Addy Osmani
* [Foundations of Programming](https://openmymind.net/FoundationsOfProgramming.pdf) - Karl Seguin (PDF)
* [Getting Real](https://basecamp.com/books/getting-real) - Basecamp, 37signals ([HTML](https://basecamp.com/gettingreal), [PDF](https://basecamp.com/gettingreal/getting-real.pdf))
* [Google Maps API Succinctly](https://www.syncfusion.com/ebooks/google_maps_api_succinctly) - Mark Lewin
* [Hacknot: Essays on Software Development](http://www.lulu.com/shop/ed-johnson/hacknot-essays-on-software-development/ebook/product-17544641.html) - Ed Johnson
* [Hello SDL](https://lazyfoo.net/tutorials/SDL) - Lazy Foo' Productions
* [High-Performance Scientific Computing](https://andreask.cs.illinois.edu/Teaching/HPCFall2012) (class lectures and slides)
* [HoloLens Succinctly](https://www.syncfusion.com/ebooks/hololens_succinctly) - Lars Klint
* [How Computers Work](http://www.fastchip.net/howcomputerswork/p1.html) - R. Young
* [How to Become a Programmer](http://softwarebyrob.wpengine.netdna-cdn.com/assets/Software_by_Rob%20_How_to_Become_a%20_Programmer_1.0.pdf) (PDF)
* [How To Manage Remote Servers with Ansible](https://www.digitalocean.com/community/books/how-to-manage-remote-servers-with-ansible-ebook) - Erika Heidi (PDF, EPUB)
* [How to Think Like a Computer Scientist](http://openbookproject.net/thinkcs/) - Peter Wentworth, Jeffrey Elkner, Allen B. Downey, and Chris Meyers
* [Image Processing in C: Analyzing and Enhancing Digital Images](http://homepages.inf.ed.ac.uk/rbf/BOOKS/PHILLIPS/) - Dwayne Phillips
* [Information Technology and the Networked Economy](https://web.archive.org/web/20200731035935/https://florida.theorangegrove.org/og/file/49843a6a-9a9d-4bad-b4d4-d053f9cdf73e/1/InfoTechNetworkedEconomy.pdf) - Patrick McKeown (PDF) *(:card_file_box: archived)*
* [Introduction to Scientific Programming in C++ and Fortran](https://web.corral.tacc.utexas.edu/CompEdu/pdf/isp/EijkhoutIntroSciProgramming-book.pdf) - Victor Eijkhout (PDF)
* [IRPF90 Fortran code generator](https://www.gitbook.com/book/scemama/irpf90/details) - Anthony Scemama
* [Learn Programming](https://progbook.org) - Antti Salonen
* [Learn to Program](https://pine.fm/LearnToProgram/)
* [Learning 30 Technologies in 30 Days: A Developer Challenge](https://blog.openshift.com/learning-30-technologies-in-30-days-a-developer-challenge/) - Shekhar Gulati
* [Linked Data Patterns: A pattern catalogue for modelling, publishing, and consuming Linked Data](http://patterns.dataincubator.org/book/) - Leigh Dodds, Ian Davis
* [Magic Ink: Information Software and The Graphical Interface](http://worrydream.com/#!/MagicInk) - Bret Victor
* [Mobile Developer's Guide to the Galaxy](https://leanpub.com/mobiledevelopersguide) *(Leanpub account or valid email requested)*
* [Modeling Reactive Systems with Statecharts](http://www.wisdom.weizmann.ac.il/~harel/reactive_systems.html)
* [MSIX Succinctly](https://www.syncfusion.com/ebooks/msix-succinctly) - Matteo Pagani
* [Networks, Crowds, and Markets: Reasoning About a Highly Connected World](http://www.cs.cornell.edu/home/kleinber/networks-book/)
* [Object-Oriented Reengineering Patterns](http://win.ua.ac.be/~sdemey/) - Serge Demeyer, Stéphane Ducasse and Oscar Nierstrasz
* [Open Government; Collaboration, Transparency, and Participation in Practice](https://github.com/oreillymedia/open_government) - Daniel Lathrop, Laurel Ruma
* [PDQ: Pretty Darn Quick: An Agile, All-Purpose Methodology](https://leanpub.com/PDQ) - Jeff Franz-Lien  *(Leanpub account or valid email requested)*
* [Philosophy of Computer Science](http://www.cse.buffalo.edu/~rapaport/Papers/phics.pdf) (PDF)
* [PNG: The Definitive Guide](http://www.libpng.org/pub/png/book/)
* [Pointers And Memory](http://cslibrary.stanford.edu/102/PointersAndMemory.pdf) (PDF)
* [Principles of Computer System Design](http://ocw.mit.edu/resources/res-6-004-principles-of-computer-system-design-an-introduction-spring-2009/online-textbook/part_ii_open_5_0.pdf) (PDF)
* [Programming Fundamentals](https://press.rebus.community/programmingfundamentals/) - Kenneth Leroy Busbee, Dave Braunschweig
* [Programming with Unicode](http://unicodebook.readthedocs.org)
* [Real-World Maintainable Software](https://www.oreilly.com/ideas/real-world-maintainable-software) - Abraham Marin-Perez
* [Record-Playback Test Automation: Sahi & Selenium IDE: Critical Evaluation of Record-Playback Automation Tools](https://leanpub.com/manualToAutomatedWithSeleniumIDEAndSahi) - Shashikant Jagtap  *(Leanpub account or valid email requested)*
* [Scientific Programming and Computer Architecture](https://divakarvi.github.io/bk-spca/spca.html) - Divakar Viswanath
* [Signal Computing: Digital Signals in the Software Domain](http://faculty.washington.edu/stiber/pubs/Signal-Computing/Signal%20Computing.pdf) - Michael Stiber, Bilin Zhang Stiber, Eric C. Larson (PDF)
* [Small Memory Software](https://smallmemory.charlesweir.com/book.html) - Charles Weir, James Noble (HTML)
* [Web Almanac](https://almanac.httparchive.org/static/pdfs/web_almanac_2019_en.pdf) (PDF)
* [Writing Native Mobile Apps in a Functional Language Succinctly](https://www.syncfusion.com/ebooks/writing_native_mobile_apps_in_a_functional_language_succinctly) - Vassili Kaplan


### Networking

* [An Introduction to Computer Networks](http://intronetworks.cs.luc.edu) (HTML, PDF, Kindle)
* [Bits, Signals, and Packets: An Introduction to Digital Communications and Networks](http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-02-introduction-to-eecs-ii-digital-communication-systems-fall-2012/readings/)
* [Code Connected vol.1](http://hintjens.wdfiles.com/local--files/main%3Afiles/cc1pe.pdf) (PDF) (book on ZeroMQ)
* [Computer Networking : Principles, Protocols and Practice](http://cnp3book.info.ucl.ac.be/1st/html/index.html) (HTML, ePub, PDF, Kindle)
* [Computer Networks: A Systems Approach](https://book.systemsapproach.org) - Larry Peterson and Bruce Davie (HTML, epub, mobi, PDF)
* [Distributed systems for fun and profit](http://book.mixu.net/distsys/single-page.html)
* [High-Performance Browser Networking](https://hpbn.co) - Ilya Grigorik
* [How HTTPS Works](https://howhttps.works) - DNSimple
* [HTTP Succinctly, Syncfusion](https://www.syncfusion.com/resources/techportal/ebooks/http) (PDF, Kindle) (email address *requested*, not required)
* [HTTP2 Explained](http://daniel.haxx.se/http2/) - Daniel Stenberg
* [Introduction to HTTP](https://launchschool.com/books/http) - Launch School
* [IPv6 for IPv4 Experts](https://sites.google.com/site/yartikhiy/home/ipv6book) - Yar Tikhiy (PDF)
* [Kafka gentle introduction](https://www.gentlydownthe.stream) - Mitch Seymour
* [Kafka, The definitive Guide](https://assets.confluent.io/m/1b509accf21490f0/original/20170707-EB-Confluent_Kafka_Definitive-Guide_Complete.pdf) - Neha Narkhede (PDF)
* [Network Science](http://networksciencebook.com) - Albert-Laszló Barabási
* [Securing Wireless Networks for the Home User Guide](https://mohamedation.github.io/securing-wifi/index-en.html) - Mohamed Adel (HTML)
* [The TCP/IP Guide](http://www.tcpipguide.com/free/t_toc.htm)
* [Understanding IP Addressing: Everything you ever wanted to know](http://pages.di.unipi.it/ricci/501302.pdf) (PDF)
* [ZeroMQ Guide](http://zguide.zeromq.org/page%3Aall)


### Open Source Ecosystem

* [Data Journalism Handbook](http://datajournalismhandbook.org)
* [Free as in Freedom: Richard Stallman and the free software revolution](https://archive.org/details/faif-2.0) - Sam Williams (PDF)
* [Free for All](https://unglue.it/work/136445/) - Peter Wayner
* [Free Software, Free Society: Selected Essays of Richard M. Stallman](http://shop.fsf.org/product/free-software-free-society-2/)
* [Getting Started with InnerSource](http://www.oreilly.com/programming/free/getting-started-with-innersource.csp) (email address *requested*, not required)
* [Getting started with Open source development](http://public.dhe.ibm.com/software/dw/db2/express-c/wiki/Getting_started_with_open_source_development_p2.pdf) (PDF)
* [GitLab Handbook](https://about.gitlab.com/handbook/)
* [How to get started with open source](https://opensource.com/resources/ebook/how-get-started-open-source) (ePub & ODT)
* [Innovation Happens Elsewhere](http://dreamsongs.com/IHE/IHE.html) - Ron Goldman, Richard P. Gabriel
* [Introduction to Networking](https://do1.dr-chuck.net/net-intro/EN_us/net-intro.pdf) - Charles Severance (PDF)
* [Open Advice: FOSS: What We Wish We Had Known When We Started](http://open-advice.org)
* [Open source in Brazil](https://www.oreilly.com/ideas/open-source-in-brazil) - Andy Oram
* [Producing Open Source Software](http://producingoss.com) - Karl Fogel
* [The Architecture of Open Source Applications: Vol. 1: Elegance, Evolution, and a Few Fearless Hacks; Vol. 2: Structure, Scale, and a Few More Feerless Hacks](http://www.aosabook.org/en/index.html)
* [The Art of Community](http://artofcommunityonline.org/Art_of_Community_Second_Edition.pdf) - Jono Bacon (PDF)
* [The Cathedral and the Bazaar](http://www.catb.org/esr/writings/cathedral-bazaar/) - Eric S. Raymond
* [The Future of the Internet](http://futureoftheinternet.org) - Jonathan Zittrain
* [The Open Source Way](http://www.theopensourceway.org/book/)
* [The Wealth of Networks: How Social Production Transforms Markets and Freedom](http://cyber.law.harvard.edu/wealth_of_networks/Main_Page) - Yochai Benkler


### Operating Systems

* [A short introduction to operating systems (2001)](http://markburgess.org/os/os.pdf) - Mark Burgess (PDF)
* [Computer Science from the Bottom Up](http://www.bottomupcs.com)
* [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)
* [Linux From Scratch](https://www.linuxfromscratch.org/lfs/view/stable/) - Gerard Beekmans, Bruce Dubbs, Ken Moffat, Pierre Labastie et al. (HTML, [PDF, downloads...](https://www.linuxfromscratch.org/lfs/downloads/stable/))
* [Making Servers Work: A Practical Guide to Linux System Administration](https://www.digitalocean.com/community/books/sysadmin-ebook-making-servers-work) - Jamon Camisso (PDF, EPUB)
* [Operating Systems and Middleware](https://gustavus.edu/mcs/max/os-book/) (PDF and LaTeX)
* [Operating Systems: Three Easy Pieces](http://pages.cs.wisc.edu/~remzi/OSTEP/) (PDF)
* [Practical File System Design: The Be File System](http://www.nobius.org/~dbg/practical-file-system-design.pdf) - Dominic Giampaolo (PDF)
* [Project Oberon: The Design of an Operating System, a Compiler, and a Computer](http://people.inf.ethz.ch/wirth/ProjectOberon/index.html) - Niklaus Wirth & Jürg Gutknecht (PDF)
* [The Art of Unix Programming](http://catb.org/esr/writings/taoup/html/) - Eric S. Raymond
* [The Design and Implementation of the Anykernel and Rump Kernels](http://www.fixup.fi/misc/rumpkernel-book/) - Antti Kantee
* [The little book about OS development](https://littleosbook.github.io) - Erik Helin, Adam Renberg
* [The Little Book of Semaphores](http://greenteapress.com/semaphores/) - Allen B. Downey
* [Think OS: A Brief Introduction to Operating Systems](http://www.greenteapress.com/thinkos/index.html) - Allen B. Downey (PDF)
* [UNIX Application and System Programming, lecture notes](http://www.compsci.hunter.cuny.edu/~sweiss/course_materials/unix_lecture_notes.php) - Prof. Stewart Weiss (PDF)
* [Writing a Simple Operating System from Scratch](http://www.cs.bham.ac.uk/~exr/lectures/opsys/10_11/lectures/os-dev.pdf) - Nick Blundell (PDF)
* [Xv6, a simple Unix-like teaching operating system](https://pdos.csail.mit.edu/6.828/2012/xv6.html)


### Parallel Programming

* [High Performance Computing](http://cnx.org/contents/bb821554-7f76-44b1-89e7-8a2a759d1347%405.2) - Charles Severance & Kevin Dowd (PDF, ePUB)
* [High Performance Computing Training](https://web.archive.org/web/20170702124132/https://hpc.llnl.gov/training/tutorials) (LLNL materials)
* [High-Performance Scientific Computing](https://andreask.cs.illinois.edu/Teaching/HPCFall2012) (class lectures and slides)
* [Introduction to High-Performance Scientific Computing](http://pages.tacc.utexas.edu/~eijkhout/istc/istc.html) - Victor Eijkhout
* [Introduction to Parallel Computing](https://computing.llnl.gov/tutorials/parallel_comp/) - Blaise Barney
* [Is Parallel Programming Hard, And, If So, What Can You Do About It?](https://www.kernel.org/pub/linux/kernel/people/paulmck/perfbook/perfbook.html) - Paul E. McKenney
* [Programming on Parallel Machines; GPU, Multicore, Clusters and More](http://heather.cs.ucdavis.edu/parprocbook) - Norm Matloff
Kerridge (PDF) (email address *requested*, not required)
* [The OpenCL Programming Book](https://us.fixstars.com/products/opencl/book/OpenCLProgrammingBook/contents/)


### Partial Evaluation

* [Partial Evaluation and Automatic Program Generation](http://www.itu.dk/people/sestoft/pebook/) - (PDF) Jones, Gomard and Sestoft


### Professional Development

* [Clean Code Developer: An initiative for more professionalism in software development](https://www.gitbook.com/book/ccd_school/clean-code-developer-com/details) (:construction: *in process*)
* [Confessions of an IT Manager](https://www.red-gate.com/library/confessions-of-an-it-manager) - Phil Factor (PDF)
* [Don't Just Roll the Dice](https://www.red-gate.com/library/dont-just-roll-the-dice) - Neil Davidson (PDF)
* [How to Do What You Love & Earn What You’re Worth as a Programmer](https://leanpub.com/dowhatyoulove/read) - Reginald Braithwaite
* [Professional Software Development For Students](https://mixmastamyk.bitbucket.io/pro_soft_dev/intro.html) - Mike G. Miller
* [Software Engineering at Google](https://abseil.io/resources/swe-book) - Titus Winters, Tom Manshreck & Hyrum Wright
* [Software Environment Concepts](https://softwareconcepts.vercel.app) - Amr Elmohamady (:construction: *in process*)
* [What I've Learned From Failure](https://leanpub.com/shippingsoftware/read) - Reginald Braithwaite


### Programming Paradigms

* [Flow based Programming](http://jpaulmorrison.com/fbp/) - J Paul Morrison
* [Introduction to Functional Programming](http://www.cl.cam.ac.uk/teaching/Lectures/funprog-jrh-1996/) - J. Harrison
* [Making Sense of Stream Processing](https://assets.confluent.io/m/2a60fabedb2dfbb1/original/20190307-EB-Making_Sense_of_Stream_Processing_Confluent.pdf) - Martin Kleppmann (PDF)
* [Mostly Adequate Guide to Functional Programming](https://mostly-adequate.gitbooks.io/mostly-adequate-guide/content/) - Mostly Adequate Core Team
* [The Pure Function Pipeline Data Flow v3.0 ---- the Grand Unified Programming Theory](https://github.com/linpengcheng/PurefunctionPipelineDataflow) - Lin Pengcheng
* [Type Theory and Functional Programming](https://www.cs.kent.ac.uk/people/staff/sjt/TTFP/)


### Regular Expressions

* [JavaScript RegExp](https://learnbyexample.github.io/learn_js_regexp/) - Sundeep Agarwal
* [Python re(gex)?](https://learnbyexample.github.io/py_regular_expressions/) - Sundeep Agarwal
* [Regular Expressions for Regular Folk](https://refrf.shreyasminocha.me) - Shreyas Minocha
* [RexEgg](http://www.rexegg.com)
* [Ruby Regexp](https://learnbyexample.github.io/Ruby_Regexp/) - Sundeep Agarwal
* [The 30 Minute Regex Tutorial](http://www.codeproject.com/Articles/9099/The-Minute-Regex-Tutorial) - Jim Hollenhorst
* [The Bastards Book of Regular Expressions: Finding Patterns in Everyday Text](https://leanpub.com/bastards-regexes) - Dan Nguyen  *(Leanpub account or valid email requested)*


### Reverse Engineering

* [BIOS Disassembly Ninjutsu Uncovered 1st Edition](http://bioshacking.blogspot.co.uk/2012/02/bios-disassembly-ninjutsu-uncovered-1st.html) - Darmawan Salihun (PDF)
* [Hacking the Xbox: An Introduction to Reverse Engineering](https://www.nostarch.com/xboxfree/) - Andrew "bunnie" Huang
* [iOS App Reverse Engineering](https://github.com/iosre/iOSAppReverseEngineering) (PDF)


### Search Engines

* [Elasticsearch: The Definitive Guide](https://www.elastic.co/guide/en/elasticsearch/guide/current/index.html) ([fork it on GH](https://github.com/elastic/elasticsearch-definitive-guide))
* [Search Engines: Information Retrieval in Practice](https://ciir.cs.umass.edu/irbook) - W. Bruce Croft, Donald Metzler, Trevor Strohman (PDF)
* [Solr for newbies workshop (2019)](https://github.com/hectorcorrea/solr-for-newbies) - Hector Correa ([PDF](https://github.com/hectorcorrea/solr-for-newbies/blob/master/tutorial.pdf))


### Security

* [A Graduate Course in Applied Cryptography](http://toc.cryptobook.us)
* [Crypto 101 - Crypto for everyone](https://www.crypto101.io)
* [Cryptography](https://en.wikibooks.org/wiki/Cryptography) - Wikibooks (HTML) (:construction: *in process*)
* [CryptoParty Handbook](https://unglue.it/work/141611/)
* [Handbook of Applied Cryptography](http://cacr.uwaterloo.ca/hac/index.html)
* [How HTTPS works](https://howhttps.works) - dnsimple
* [How to deal with Passwords](https://github.com/MHM5000/pass)
* [Intrusion Detection Systems with Snort](http://ptgmedia.pearsoncmg.com/images/0131407333/downloads/0131407333.pdf) (PDF)
* [OpenSSL Cookbook](https://www.feistyduck.com/library/openssl-cookbook/)
* [OWASP Mobile Security Testing Guide](https://mobile-security.gitbook.io/mobile-security-testing-guide/) - Bernhard Mueller et al.
* [OWASP Testing Guide 4.0](https://www.owasp.org/images/1/19/OTGv4.pdf) (PDF)
* [OWASP Top 10 for .NET Developers](http://www.troyhunt.com/2011/12/free-ebook-owasp-top-10-for-net.html)
* [Security Engineering](http://www.cl.cam.ac.uk/~rja14/book.html)
* [The Joy of Cryptography (2021)](https://web.engr.oregonstate.edu/~rosulekm/crypto/) - Mike Rosulek (PDF) (:construction: *in process*)


### Software Architecture

* [A Primer on Design Patterns](https://leanpub.com/aprimerondesignpatterns) - Rahul Batra (HTML, PDF, EPUB, Kindle) *(Leanpub account or valid email requested)*
* [Agile Planning: From Ideas to Story Cards](https://launchschool.com/books/agile_planning) - Launch School
* [Architectural Styles and the Design of Network-based Software Architectures](http://www.ics.uci.edu/~fielding/pubs/dissertation/top.htm) - Roy Thomas Fielding
* [Best Kept Secrets of Peer Code Review](http://smartbear.com/lp/ebook/collaborator/secrets-of-peer-code-review/)
* [Building Secure & Reliable Systems](https://static.googleusercontent.com/media/landing.google.com/en//sre/static/pdf/Building_Secure_and_Reliable_Systems.pdf) - Heather Adkins, Betsy Beyer, Paul Blankinship, Piotr Lewandowski, Ana Oprea & Adam Stubblefield (PDF)
* [Data-Oriented Design](http://www.dataorienteddesign.com/dodmain/dodmain.html)
* [Developing Reactive Microservices](https://info.lightbend.com/COLL-20XX-Developing-Reactive-Microservices_Landing-Page.html) (email address *requested*, not required)
* [Domain Driven Design Quickly](http://www.infoq.com/minibooks/domain-driven-design-quickly)
* [Domain-Driven Design: The First 15 Years. Essays from the DDD community](https://dddeurope.com/15years/) - Domain-Driven Design Europe ([HTML, PDF, ePub](https://leanpub.com/ddd_first_15_years/)) *(Leanpub account or valid email requested)*
* [DSL Engineering: Designing, Implementing and Using Domain-Specific Languages](http://dslbook.org) - Markus Voelter
* [Exploring CQRS and Event Sourcing](https://docs.microsoft.com/en-us/previous-versions/msp-n-p/jj554200(v=pandp.10)) - Dominic Betts, Julián Domínguez, Grigori Melnik, Mani Subramanian, Fernando Simonazzi ([EPUB, PDF](http://www.microsoft.com/en-us/download/details.aspx?id=34774) - [code samples](http://go.microsoft.com/fwlink/p/?linkid=258571))
* [Guide to the Software Engineering Body of Knowledge](https://www.computer.org/education/bodies-of-knowledge/software-engineering/v3) (email adddress *requested*)
* [How to Design Programs](http://www.htdp.org)
* [How to Write Unmaintainable Code](http://mindprod.com/jgloss/unmain.html)
* [Kanban and Scrum - making the most of both](http://www.infoq.com/minibooks/kanban-scrum-minibook)
* [Kanban for skeptics](https://leanpub.com/kanbanforskeptics) - Nick Oostvogels  *(Leanpub account or valid email requested)*
* [Microservices AntiPatterns and Pitfalls](http://web.archive.org/web/20210205164251/https://www.oreilly.com/programming/free/files/microservices-antipatterns-and-pitfalls.pdf) - Mark Richards (PDF) *(:card_file_box: archived)*
* [Microservices vs. Service-Oriented Architecture](https://www.oreilly.com/radar/microservices-vs-service-oriented-architecture/) - Mark Richards (HTML)
* [Migrating to Cloud-Native Application Architectures](https://developers.redhat.com/books/migrating-microservice-databases-relational-monolith-distributed-data/) (email address *requested*) (PDF)
* [Naked objects](http://downloads.nakedobjects.net/resources/Pawson%20thesis.pdf) - Richard Pawson (PDF)
* [OAuth - The Big Picture](https://pages.apigee.com/oauth-big-picture-ebook.html) (email address *requested*)
* [Object-Oriented Reengineering Patterns](http://scg.unibe.ch/download/oorp/) - S. Demeyer, S. Ducasse and O. Nierstrasz
* [Practicing Domain-Driven Design - Part 1](https://leanpub.com/Practicing-DDD) - Scott Millett  *(Leanpub account or valid email requested)*
* [Reactive Microservices Architecture](https://www.lightbend.com/ebooks/reactive-microservices-architecture-design-principles-for-distributed-systems-oreilly) (email address *requested*)
* [Reactive Microsystems: The Evolution of Microservices at Scale](https://www.lightbend.com/ebooks/reactive-microsystems-evolution-of-microservices-scalability-oreilly) (email address *requested*)
* [Scrum and XP from the Trenches](http://www.infoq.com/minibooks/scrum-xp-from-the-trenches-2)
* [Serverless apps: Architecture, patterns, and Azure implementation](https://docs.microsoft.com/en-us/dotnet/standard/serverless-architecture/)
* [Serverless Design Patterns and Best Practices](https://www.packtpub.com/free-ebooks/serverless-design-patterns-and-best-practices) - Brian Zambrano (Packt account *required*)
* [Shape Up - Stop Running in Circles and Ship Work that Matters](https://basecamp.com/shapeup) - Ryan Singer (PDF)
* [Site Reliability Engineering](https://landing.google.com/sre/book/index.html)
* [Software Architecture Patterns](http://www.oreilly.com/programming/free/software-architecture-patterns.csp) (email address *requested*, not required)
* [Software Engineering for Internet Applications](http://philip.greenspun.com/seia/)
* [Source Making Design Patterns and UML](https://sourcemaking.com/design_patterns)
* [Test Driven Development, Extensive Tutorial](https://github.com/grzesiek-galezowski/tdd-ebook) - Grzegorz Gałęzowski
* [The Site Reliability Workbook](https://landing.google.com/sre/workbook/toc/) - Betsy Beyer, Niall Richard Murphy, David K. Rensin, Kent Kawahara and Stephen Thorne
* [Web API Design](https://pages.apigee.com/rs/apigee/images/api-design-ebook-2012-03.pdf) - Brian Mulloy (PDF)
* [Working with Web APIs](https://launchschool.com/books/working_with_apis) - Launch School
* [Your API Is Bad](https://leanpub.com/yourapiisbad/read) - Paddy Foran


### Standards

* [Linux Standard Base](http://refspecs.linuxfoundation.org/lsb.shtml)
* [UNIX - The POSIX Standard - IEEE Std 1003.1](https://github.com/geoff-codes/posix-standard)


### Theoretical Computer Science

* [Building Blocks for Theoretical Computer Science](http://mfleck.cs.illinois.edu/building-blocks/index.html) - Margaret M. Fleck
* [Category Theory for Computing Science](http://www.tac.mta.ca/tac/reprints/articles/22/tr22.pdf) (PDF)
* [Category Theory for Programmers](https://github.com/hmemcpy/milewski-ctfp-pdf) - Bartosz Milewski (PDF)
* [Delftse Foundations of Computation](https://textbooks.open.tudelft.nl/textbooks/catalog/book/13) - Stefan Hugtenburgand, Neil Yorke-Smith @ TU Delft Open (PDF)
* [Design of a Programmer](https://www.smashwords.com/books/view/639609) - Prakash Hegade (PDF)
* [Homotopy Type Theory: Univalent Foundations of Mathematics](http://homotopytypetheory.org/book/) (PDF)
* [Introduction to Computer Science](http://www.cse.iitd.ernet.in/~suban/CSL102/) - Prof. Subhashis Banerjee, IIT Delhi
* [Introduction to Computing](http://www.computingbook.org)
* [Introduction to Theory of Computation](http://cglab.ca/~michiel/TheoryOfComputation/) - Anil Maheshwari and Michiel Smid (PDF)
* [Models of Computation](http://cs.brown.edu/people/jes/book/) - John E. Savage
* [Practical Foundations for Programming Languages, Preview](https://www.cs.cmu.edu/~rwh/pfpl/2nded.pdf) - Robert Harper (PDF)
* [Principles of Programming Languages](https://web.archive.org/web/20150418034451/http://www.cs.jhu.edu/~scott/pl/book/dist/) - Scott F. Smith
* [Programming and Programming Languages](https://papl.cs.brown.edu/2019/) - Shriram Krishnamurthi
* [Programming in Martin-Löf's Type Theory](http://www.cse.chalmers.se/research/group/logic/book/) - Bengt Nordstroem
* [Programming Languages: Application and Interpretation (2nd Edition)](http://cs.brown.edu/~sk/Publications/Books/ProgLangs/) - Shriram Krishnamurthi
* [Programming Languages: Theory and Practice](http://people.cs.uchicago.edu/~blume/classes/aut2008/proglang/text/offline.pdf) - Robert Harper (PDF)
* [Semantics with Applications: A Formal Introduction](http://www.cs.ru.nl/~herman/onderwijs/semantics2019/wiley.pdf) - Hanne Riis Nielson, Flemming Nielson (PDF)
* [Structure and Interpretation of Computer Programs](https://mitpress.mit.edu/sicp/)
* [Structure and Interpretation of Computer Programs](http://sarabander.github.io/sicp/html/index.xhtml)
* [The Black Art of Programming](http://self.gutenberg.org/wplbn0002828847-the-black-art-of-programming-by-mcilroy-mark.aspx?) - Mark McIlroy
* [The Craft of Programming](https://kilthub.cmu.edu/articles/The_Craft_of_Programming/6610514) - John C. Reynolds
* [Theory of Computation, Making Connections](https://joshua.smcvt.edu/computation) - Jim Hefferon (PDF)
* [Think Complexity](https://greenteapress.com/wp/think-complexity-2e/) - - Allen B. Downey (2nd Edition) (PDF, HTML)


### Web Performance

* [Book of Speed](http://www.bookofspeed.com) - Stoyan Stefanov
* [Designing for Performance](http://designingforperformance.com) - Lara Hogan
* [High Performance Accelerated Websites](https://thisisyuu.github.io/ebook) - Anshul (HTML) (:construction: *in process*)
* [High Performance Browser Networking](https://hpbn.co) - Ilya Grigorik
* [Mature Optimization](http://carlos.bueno.org/optimization/mature-optimization.pdf) - Carlos Bueno (PDF)


### Web Services

* [RESTful Web Services](http://restfulwebapis.org/RESTful_Web_Services.pdf) (PDF)


### Workflow

* [Declare Peace on Virtual Machines. A guide to simplifying vm-based development on a Mac](https://leanpub.com/declarepeaceonvms/read)