Sun Unix was introduced by Sun Microsystems in 1982 and branded SunOS in 1983 at which point a windowing system was introduced. In 1992, SunOS 5 was rebranded as Solaris 2.0 with the original BSD code base replaced with the System V Release 4 code base developed jointly with AT&T. The original windows system was SunTools (later SunView) with NeWS (written in the Postscript language) made available in 1986. Sun replaced SunView in 1989 with two new options implementing the OPEN LOOK specification for X Windows: XView (using SunView libraries) and OpenWindows (using Xt libraries from X Windows). Support for NeWS was dropped in 1993 and in 1995 SunOS switched to the industry standard CDE (Common Desktop Environment). XView and OpenWindows were supported until the release of Solaris 11 in 2016.