The Free On-line Dictionary of Computing (30 December 2018):

Network File System
NFS

    (NFS) A protocol developed by
   Sun Microsystems, and defined in RFC 1094, which allows a
   computer to access files over a network as if they were on its
   local disks.  This protocol has been incorporated in
   products by more than two hundred companies, and is now a de
   facto standard.  NFS is implemented using a connectionless
   protocol (UDP) in order to make it stateless.

   See Nightmare File System, WebNFS.

   (1994-12-12)