You sure that isn't just a backronym? It seems highly unlikely given its peers (/etc, /lib, /bin, none of which are acronyms) and given the system it lives in,

You sure that isn't just a backronym? It seems highly unlikely given its peers (/etc, /lib, /bin, none of which are acronyms) and given the system it lives in, which I don't think used the word "resources" anywhere else. When I google I mainly find drive-by assertions that it means "UNIX System Resources" (and sometimes "User Specific Resources"). The closest I can find to something real is: http://tldp.org/LDP/Linux-Filesystem-Hierarchy/html/usr.html http://tldp.org/LDP/Linux-Filesystem-Hierarchy/html/usr.html