Editing SunOS (section)

=="SunOS" and "Solaris"==
[[Image:SunOS 4.1.1 P1270750.jpg|thumb|SunOS 4.1.1 tape]]
In 1987, [[AT&T Corporation]] and Sun announced that they were collaborating on a project to merge the most popular Unix flavors on the market at that time: BSD (including many of the features then unique to SunOS), [[System V]], and [[Xenix]]. This would become [[System V Release 4]] (SVR4).<ref name="Salus"/> 

On September 4, 1991, Sun announced that its next major OS release would switch from its BSD-derived source base to one based on SVR4.  Although the internal designation of this release would be ''SunOS&nbsp;5'', from this point Sun began using the marketing name ''[[Solaris (operating system)|Solaris]]''. The justification for this new "overbrand" was that it encompassed not only SunOS, but also the [[OpenWindows]] desktop environment and [[Open Network Computing]] (ONC) functionality.

Even though the new SVR4-based OS was not expected to ship in volume until the following year, Sun immediately began using the new ''Solaris'' name to refer to the currently shipping SunOS 4 release (also including OpenWindows).  Thus SunOS 4.1.1 was rebranded ''Solaris&nbsp;1.0''; SunOS 5.0 would be considered a part of Solaris&nbsp;2.0.  SunOS&nbsp;4.1.''x'' micro versions continued to be released through 1994, 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:

{| class="wikitable"
|+ '''SunOS 4.1.''x'' / Solaris 1.''x'' / OpenWindows releases'''
|-
! SunOS Version !! Solaris version !! OpenWindows version
|-
| 4.1.1<br>4.1.1B<br>4.1.1.1  || 1.0 || 2.0
|-
| 4.1.2  || 1.0.1 || 2.0
|-
| 4.1.3  || 1.1 SMCC Version A || 3.0
|-
| 4.1.3C || 1.1C || 3.0
|-
| 4.1.3_U1 || 1.1.1  || 3.0_U1
|-
| 4.1.3_U1B || 1.1.1B || 3.0_U1B
|-
| 4.1.4 || 1.1.2 || 3.0_414
|}

Today, SunOS&nbsp;5 is universally known as ''Solaris'', although the ''SunOS'' name is still visible within the OS itself{{snd}} in the startup banner, the output of the [[uname]] command, and [[man page]] footers, among other places.

Matching a SunOS&nbsp;5.x release to its corresponding Solaris marketing name is simple: each Solaris release name includes its corresponding SunOS&nbsp;5 minor version number. For example, Solaris&nbsp;2.4 incorporated SunOS&nbsp;5.4.  There is one small twist: after Solaris&nbsp;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&nbsp;5.11.