This page demonstrates how CMOS transistors and basic gates work.

Free and open source software for numerical computation, providing a powerful computing environment for engineering and scientific applications.

MIT's Engineering Systems division offers many online courses. Course format generally includes lecture videos, interactive concept quizzes (solution key), problem sets, terms and definitions, suggested topics and links, and exams (with solution key).

UC Irvine OpenCourseWare offers an online course called CEE 20: Introduction to Computational Engineering Problem Solving.

This book presents the various aspects of modern structural analysis, ranging from elementary continuum mechanics theory to advanced analysis using open-source software.

A list of open textbooks in Electronics and Engineering.

Succinct compendium of some of the more recent variants of DWTs and their use.

An OpenStax text created at Rice University.

Course including readings, simulations, “walk-throughs” that integrate voice and graphics to explain a procedure or a difficult concept, and computer tutors in which students practice problem solving with hints and feedback. Created by Carnegie Mellon University.