Does not work this way in Zsh. What's the purpose of that in Bash?
Certain versions of Unix, and early network file systems, used paths of the form //hostname/path to access 'path' on server 'hostname'.
It directly ties in with the URL format:
scheme://hostname/path/to/file
How cool it would be if we could go:
cd //google.com/search?q=quack+like+duck
and we would get a directory with 1 file per result (or to be really unix like: 1 directory per result, with a set of files and directories for different aspects of the result hehehe :))/proc (procfs) is basically this but for kernel structures.
It is a really cool idea. I find it makes many things easy to deal with, and those that aren’t? Interesting to think about.
The hierarchical abstraction of a file system is a good model from many things