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

Appletalk

    A proprietary local area network
   protocol developed by Apple Computer, Inc. for
   communication between Apple products (e.g. Macintosh) and
   other computers.  This protocol is independent of the network
   layer on which it runs.  Current implementations exist for
   Localtalk, a 235 kilobyte per second local area network and
   Ethertalk, a 10 megabyte per second local area network.

   (1995-03-08)