On NeXTSTEP and OS X, the &#x2F;Apps (&#x2F;Applications) directory is for self-contained application bundles that hold a GUI application and all of its dependencies that aren&#x27;t part of the base OS, and they can be installed and removed by dragging and dropping that one bundle (which is a directory, but appears in the graphical file manager as a single object). There was also a distinction between locally-installed stuff and network resources which made things a little more complex but more manageable if you were actually working in an office full of NeXT boxes. OS X still has &#x2F;usr and it still has pretty much the same meaning, but GUI apps live in a separate and more user-friendly domain.