Back in the late 1960s, University of California, Berkeley, published its first public BSD licenses promoting free software that could be reused by anyone. A few years later, in the 70s, BSD Unix was released by CSRG, a research group inside of Berkeley, and laid the foundation for many operating systems (including Mac OS X) as we know it today. It gradually evolved over time to support socket models, TCP/IP, Unix’s file model, and a lot more. You’ll find traces of all of these principals – and very often, core code itself, still used 50 years later in cutting edge operating systems. The idea of “free software” (whether “free as in beer” or “free as in freedom”) is credited as a driving force behind today’s technology, multi-billion dollar fortune companies, and even the iPhone or Android device sitting in your pocket. Here’s the rub: None of it was ever really free.