found: Work cat.: DiBona, C. Opensources, 1999:introduction (a new movement in programming that promotes the use of software whose source code is open to all, rather than proprietary; outgrowth of, and advocated by, the Free software movement)
found: Open Source website, April 28, 1999(Open source, sometimes spelled Opensource, software is a software whose source code is publicly available along with applications of that software; the software is sometimes provided free, sometimes commercially sold by a vendor)
found: Alta Vista, April 29, 1999(1536 citations on "open code" as synonymous with "open source" software)