When I first started teaching about web publishing three years ago , there were people who came on my publishing courses who had not browsed the web. But they all were comfortable the concepts behind files, directories and path names. Now, everyone who comes on one of my courses has browsed the web extensively; but many don't really get the concept of directories and files and path names.
This is an improvement in accessibility and in desktop tools that conceal file path names from users (in a seamless manner), but this leads to problems.
A pathname, by the way, can be something like C:\EMAIL\CONFIG\MIME.TYP or /usr/local/lib/mime.types