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

YTalk

   Version: V3.0 Patch Level 1.

    A multi-user chat program by Britt Yenne
   .  YTalk works almost exactly like the
   standard Unix talk program and even communicates with the
   same talk daemon(s), but YTalk supports multiple
   connections.

   Multiple user names may be given as command-line arguments, in
   the form "name#tty@host" where the optional "#tty" specifies a
   particular tty.

   YTalk is able to communicate with both existing versions of
   Unix talk daemons.  Once connected, typing escape gives
   access to a menu of commands to add or delete users, trace
   to a file, or set options.  If run under the X Window
   System, YTalk will use separate X windows for each user in
   the conversaton, otherwise it will split the terminal screen
   between them.

   E-mail: .

   [FTP?]

   (1995-04-04)