I’ve been casually developing some resources for a course on LSLK, the first week is all about learning terminology. Here’s the first article called “Terminology — Week 1“.
Some big names use libre software like HP, IBM, Google, Yahoo, Amazon and the pure open-source vendors Red Hat, JBoss and MySQL so you might not be aware that you’ve probably used it at some point. David A. Wheeler’s Paper provides quantitative data showing why business people should look at FOSS. More on that later.