The term 'open source' wasn't used before 1998 and the OSI popularized the term, so originally at least when people said open source they meant an OSI approved

The term 'open source' wasn't used before 1998 and the OSI popularized the term, so originally at least when people said open source they meant an OSI approved license. The term has become slightly less precise over time. https://books.google.com/ngrams/graph?content=open+source&year_start=1980&year_end=2015&corpus=15&smoothing=0&share=&direct_url=t1%3B%2Copen%20source%3B%2Cc0 https://books.google.com/ngrams/graph?content=open+source&ye...