--- SITE: A logical view of a physical NETWORK of systems as defined by
SITE FILES.

--- NETWORK: A physical collection of Lambdas and other computer systems
which are linked together (typically, via Ethernet).

--- SITE FILES: Those files which contain the site data; they are
contained on the SYSTEM HOST in the in the logical directory "SYS:
SITE;".

--- SYSTEM HOST: There is one physical host per SITE which is designated
as the system host; its file system contains certain directories of
system files that are shared by all the hosts on/of that site: the SITE
FILES, SYSTEM SOURCES, font files, etc. 
 
--- ASSOCIATED MACHINE: This is a host name, associated with each host
to specify where the users of that machine have their files located.
This is used by (LOGIN) as the default of the host where the user's
directory may be found. There are three common situations:

1) If a host does not have a filesystem, then its ASSOCIATED MACHINE
will have to be some other FILE SERVER HOST.

2) If a host has its own filesystem containing user directories, its
ASSOCIATED MACHINE should be itself.

3) If a host is, for example, a slot 4 processor, and the file system of
the slot 0 processor in the same rack contains the user directories for
slot 4 users, then the slot 4 processor's ASSOCIATED MACHINE should be
the name of the slot 0 host.

The ASSOCIATED MACHINE for each host is specified as the fourth
parameter in the host's "SYS:LMLOCS;" entry. 
For example, the ASSOCIATED MACHINE for LAMBDA-B is called LAMBDA-KING:

   ("LAMBDA-B" "Lambda B" "System Lab" (LMI 0) "LAMBDA-KING" ...)

--- FILE SERVER HOST: any system on the network that allows users of
other systems to retrieve files; typically used to refer to a system of
a different type (as when many Lambda systems without filesystems file
serve from a VAX).

--- FILE-SYSTEM: On a Lambda, a disk partition formatted properly to
contain Lambda files; typically called FILE, FIL1, FIL2 or 1FI1, 1FI2,
etc.  

--- SYSTEM SOURCES: With each operating system release, LMI delivers
LISP source files containing code and documentation.  These are
generally located in the "SYS:" directories (e.g., "SYS:ZWEI;" which
contains sources for ZMacs and ZMail).  See also PATCH DIRECTORY.

--- DEFSITE: 1) The site data which defines global options for a SITE;
2) The LISP form contained in "SYS:SITE;SITE.LISP" which contains these
global option definitions.

--- PATCH DIRECTORY:  A system source directory containing patch files
which reflect a specific update to system software; typically contained
in "SYS:PATCH;".