The versions of Unix that are distributed as open source software, such as BSD Unix, Solaris and Linux. See open source.
"open source Unix." YourDictionary, n.d. Web. 17 August 2018. <http://www.yourdictionary.com/open-source-unix>.
open source Unix. (n.d.). Retrieved August 17th, 2018, from http://www.yourdictionary.com/open-source-unix