MUG's files are of two types, those which are and those which are not   specific to a given player. Message files apply to all players, as do   Locations, Room Contents, and some  entries in Object and Mobile files. You will need to load a specific    player before you can edit Object   or Mobile files.                    A location's Preposition refers to  the preposition used in response to a Where command, when an object or  mobile is in that location.  E.g.   IN the East Yard, or ON the Road.   You may use IN, AT, or ON.          A location's Site determines whetherit is susceptible to weather.  NB nosummoning is possible Underground.  A room's contents are those objects of a non-portable nature which are  visible in that location.  Some of  these are highly significant in the original MUG, so edit them with     care!  Use Search to check which    locations contain an item of that   number, so that you may edit the    room's description accordingly.     An object's Search name is that     abbreviated name which the parser   searches for when a MUG command     line is entered.                    Site:  use the numbers 1-499 for    straightforward MUG locations,      500 to refer to the player, 501-    599 to put the object in another,   and 5001-5050 for Mobiles.          A mobile's Search name is that      abbreviated name which the parser   searches for when a MUG command     line is entered.                                                        Fight value:  this is the amount of points a player earns by killing    this mobile, within the range 1000- 40000.                              Changing MUG's messages can lead to unusual effects - proceed with care!To save disk-space, these messages  are compressed.  You will find that if you use too many upper-case      letters, the packer will complain.  Use of lower-case letters, notably  vowels and t, d, s, r, h, and l,    is recommended.                     Copy:  certain attributes of Objectsand Mobiles, e.g. site, are specificto individual players.  To repeat   changes made to a player's Objects  or Mobiles, use Copy to copy one    player to another.                  Fiddle:  use this to tamper with a  player's score, or to get a player  an object that is tricky to find.   