Open source software (Topical Term)

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)

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)

Alta Vista, April 29, 1999 (1536 citations on "open code" as synonymous with "open source" software)