Open Educational Resources (OER) by Subject

Computing

• Algorithms and Data Structures With Applications to Graphics and Geometry (Global Text Project/Open Textbook Library)
• A Brief Introduction to Engineering Computation with MATLAB (BC Institute of Technology/Open Textbook Library)
• A Computational Introduction to Number Theory and Algebra (New York University/Open Textbook Library)
• Digital Circuit Projects: An Overview of Digital Circuits Through Implementing Integrated Circuits (Gettysburg College)
• Foundations of Computation (Hobart and William Smith Colleges/Open Textbook Library) 
• High Performance Computing (OpenStax CNX/Open Textbook Library)
• Implementing a One Address CPU in Logisim (Gettysburg College/Open Textbook Library)
• An Introduction to Ontology Engineering (University of Cape Town/Open Textbook Library)
• Introduction to the Modeling and Analysis of Complex Systems (Open SUNY/Open Textbook Library)
• Signal Computing: Digital Signals in the Software Domain (Open Textbook Library)

Databases

• Database Design (City University/Open Textbook Library) 
• Relational Databases and Microsoft Access (University of Winnipeg/Open Textbook Library)

Information Systems

• Business Information Systems: Design an App for That (Ohio University/Open Textbook Library)
• Information Systems for Business and Beyond (Biola University/Open Textbook Library)
• Information Systems: A Manager's Guide to Harnessing Technology (University of Minnesota/Open Textbook Library)

Networks

• Computer Networking: Principles, Protocols and Practice (Saylor Foundation/Open Textbook Library)
• An Introduction to Computer Networks (Loyola University/Open Textbook Library)

Programming Languages:  Assembly

• Introduction to MIPS Assembly Language Programming (Gettysburg College/Open Textbook Library)

Programming Languages: C

• Embedded Controllers Using C and Arduino (Open Textbook Library)
• How to Think Like a Computer Scientist:  C Version (Open Textbook Library)
• How to Think Like a Computer Scientist: C++ Version (Open Textbook Library)
• Programming Fundamentals - A Modular Structured Approach Using C++ (Houston Community College/Open Textbook Library)

Programming Languages:  Java

• Eloquent JavaScript: A Modern Introduction to Programming (Open Textbook Library)
• Introduction to Programming Using Java (Hobart and William Smith Colleges/Open Textbook Library)
• Java, Java, Java : Object-Oriented Problem Solving (Trinity College/Open Textbook Library)
• Think Data Structures: Algorithms and Information Retrieval in Java (Open Textbook Library)

Programming Languages:  Pharo

• Deep into Pharo (Open Textbook Library)
• Enterprise Pharo: A Web Perspective (Open Textbook Library)
• The Spec UI Framework (Open Textbook Library)

Programming Languages: Python

• A Byte of Python (Open Textbook Library) 
• How to Think Like a Computer Scientist: Learning with Python (Open Textbook Library)

Programming Languages: Squeak

• Squeak by Example (Open Textbook Library)

Robotics

• Introduction to Autonomous Robots (University of Colorado-Boulder/Open Textbook Library)