This is a list of changes noting the major differences between Galatea 2.2 and
Galatea 2.4

+ Server now has record functionality.
+ Server does not reset switchers and players when rebuilding volume
  table.
+ Many new library routines.
+ Certain obsolete and never-documented library routines, such as 
  GIndex() and GReset() have been eliminated.
+ Run-time mounting of discs on players.
+ All directory names (except Glib) are lower case.
+ All files names are less than 13 characters long.
+ gctl accepts some X defaults.
+ The UNIX domain socket is now called /dev/gal-unix  (Client library
  will also try the old location /tmp/.G-unix/G for some backward 
  compatibility.)
+ Server now supports Sony LDP models 1500 and 2000, as well as
  Panasonic models TQ-2026F, TQ-2027F, TQ-3031F, and TQ-3032F.
  Recording works on the TQ-3031F but is untested on the TQ-2026F.
+ Server no longer forks to create the unlocking (supervisor) process.
+ Complete build is configured by the config file in the conf directory
  using the gconfig program.  There should be no need to edit individual
  Makefiles.

This is a list of changes noting the major differences between Galatea 2.4
and Galatea 2.5 (3/12/91)

+ Server now additionally supports the NEC PC-VCR.
+ G_INT32 is now the primary unit of communication for Galatea.  Glib is
  now more portable to architectures with non-32-bit int's.
+ The mount and unmount calls now take an extra "options" argument.
+ New Glib call GGetSpeed()
+ New Glib call GPlaySequence()
+ New Glib call GOpenedHost()
+ New Glib call GDub()
+ New Glib call GErrorString()
+ Some errors while opening devices are now non-fatal.
+ Changed GPlaySeg() to accept CURRENT_FRAME for start frame.
+ Speed argument for GPlaySeg() is now automatically corrected for
  direction.
+ GConfigure() now takes VIDEO_CHAN to support video muting.
+ Added async request forwarding, but this is as yet untested.
+ Server will no longer hang on incomplete client data.  New internal
  functions serv_full_read(), serv_acceptint(),serv_acceptstring() and 
  tunable MAX_BLOCK handle timeouts on reading from clients.
+ Running the server with the -devices option will cause the server to
  print out the supported devices, then exit.
+ Created new subdirectory under 'server' called 'dcm' which contains
  all of the device dependent "Device Control Modules" for the Galatea
  server.  Adding a new DCM involves modifying the Makefile and models.h
  in server/dcm, adding the code for the new DCM to that directory, and
  recompiling the server. 
+ Added an extension mechanism to Galatea which is compatible with all
  old clients and servers.  It exists in a subdirectory of 'server' 
  called 'ext'.
+ Added a new command to gman to handle the playing of sequences with 
  the new GPlaySequence() library call.
+ gman is a lot easier to use, with better prompting and script 
  capability.
+ greset will try to use GRebuild() to do a reset if the kill(2) 
  does not work.

Changes by Russ Sasnett:
+ Server now supports the Pioneer LDV-4200.
+ rpd structure now contains an extension element.
+ Build operation has been extensively improved.  See documentation.
+ Corrected errors in Sony and VDP50 drivers for variable speed playback.
  Sony now plays reverse segments.
+ Corrected UNIX domain socket code in Glib and server.
+ Added RETURN_NOW_WITH_SPEED flag to GPlaySeg().