and each of these was also given a Solaris 1.x equivalent name. In practice, these were often still referred to by customers and even Sun personnel by their SunOS release names. Matching the version numbers was not straightforward: Today, SunOS 5 is universally known as Solaris, although the SunOS name is still visible within the OS itself in the startup banner, the output of the uname command, and man page footers, among other places. Matching a SunOS 5.x release to its corresponding Solaris marketing name is simple: each Solaris release name includes its corresponding SunOS 5 minor version number. For example, Solaris 2.4 incorporated SunOS 5.4. There is one small twist: after Solaris 2.6, the "2." was dropped from the Solaris name and the SunOS minor number appears by itself. The latest Solaris release is named Solaris 11 and incorporates SunOS 5.11. User interface GUI environments bundled with earlier versions of SunOS included SunTools (later SunView) and NeWS. In 1989, Sun released OpenWindows, an OPEN LOOK-compliant X11-based environment which also supported SunView and NeWS applications. This became the default SunOS GUI in SunOS 4.1.1. See also Comparison of BSD operating systems Comparison of operating systems Illumos OpenSolaris OpenIndiana Solaris (operating system) Unix wars References External links The Sun Hardware Reference (Overview) An Introduction to Solaris – a sample chapter from Solaris Internals: Core Kernel Architecture by Jim Mauro & Richard McDougall, Prentice-Hall, 2000. (PDF) Info on SunOS from OSdata (last updated February 17, 2002) Initial Solaris announcement Berkeley Software Distribution Discontinued operating systems Sun Microsystems software UNIX System V