Solaris 2.0, the first release of the successor to SunOS 4, included OpenWindows 3.0.1. Starting with Solaris 2.3 in late 1993, Sun switched to a standard X11R5 release of X11. It was still called OpenWindows (now version 3.3), but the NeWS protocol was replaced by support for Display PostScript. Support for SunView applications was removed. The graphical look and feel of the window manager and tools is still based on OPEN LOOK. Solaris 7 featured OpenWindows 3.6.1, with an X11R6.4 server.