4 ms·Microsoft Xunil?by MarsAscendant 8y agoMicrosoft Xunil?pjc50 8y agoXenix 2!JdeBP 8y agoThat was originally known as Xenix V and was released in 1985. IBM sold it as Xenix 2.0 at the time. SCO was using Arabic version numbers by 1988, when it was up to Xenix 386 Release 2.3.