Linux.com - https://www.linux.com/news/stop-calling-everything-open-source-what-open-source-really-means
What does open source mean? That’s an increasingly tough question to answer because the term is now being applied everywhere and to everything — which is not good. To understand why open source is losing its meaning, you have to start by tracing the origins of the phrase.
Open source was a term originally used in the intelligence community. It had nothing to do with software.