FOSS

***Free and open source software, also F/OSS, FOSS, or FLOSS s software that is liberally licensed to grant the right of users to use, study, change, and improve its design through the availability of its source code. This approach has gained both momentum and acceptance as the potential benefits have been increasingly recognized by both individuals and corporate players.***

***The first known use of the phrase "free open source software" on Usenet was in a posting on 18 March 1998, just a month after the term "open source" itself was coined.***