Agreed. Via Wikipedia, &quot;Nib, the generic name assigned to .nib and .xib files, short for NeXT Interface Builder, the default file format for Apple&#x27;s Interface Builder.&quot; More: <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Interface_Builder" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Interface_Builder</a>