Mainstream Open Source turns 20
While open source software is ubiquitous, recognized across industries as a fundamental infrastructure component as well as a critical factor for driving innovation, the "open source" label was coined only 20 years ago.
The concept of open source software – as opposed to free software or freeware – is credited to Netscape which, in January 1998, announced plans to release the source code of its proprietary browser, Navigator, under a license that would freely permit modification and redistribution. This code is today the basis for Mozilla Firefox and Thunderbird.
The Open Source Initiative (OSI) regards that event as the point at which "software freedom extended its reach beyond the enthusiast community and began its ascent into the mainstream".
Some more history at http://bit.ly/2DpPRZ3