The Lprint utility supports printing of documents on laser printers.  It
consructs the correct options string for the Queue.Print command to
print images on on the laser printer.  The printer class can be entered
explicitly or can be retrieved from the file !Machine.Laser_Class by
default.  See the System Manager's Guide for setting up printer queues
and classes.
  
The procedure Initialize_Print_Spooler supports the automatic setup of
network printer devices at system initialization time.  This tool parses
a file called Printer_Configuration located by default in "!Machine". 
It automatically calls the commands in package Queue using this
information to set up the specified classes, devices and the registering
of those classes with a specific device.  It also constructs several files
used to define the newtork location of all printers.  If a printer is
moved to a new location, the files specifying these locatations can
be automatically reconfigured.  Printing commands (like Lprint) consult
these files to find the current location of a specific printer.
  
  An example configuration file is

-- This is the Rational printer configuration
-- * indicates the default class
--NetNam Class  Device       Dev Options                 Class File
-------- -----  ------------ --------------------------  ---------------------
lp       lp     terminal_29  rts                         !Machine.Lp_Class      
wp       wp     terminal_30  xon_xoff                    !Machine.Wp_Class 
Merlin   mlaser terminal_253 laser_comm,host=mktg_laser  !Machine.Mlaser_Class 
*Merlin  apple  terminal_255 laser_comm,host=apple_print !Machine.Laser_Class 

Key:

NetNam      - Network name of the host for this class
Class       - Name of the class being defined
Device      - Device on which the class will be printed
Dev Options - Options passed when adding the device with Queue.Add
Class File  - Location of the file that is updated with the full network
              name of the class
              (like !!Zebra.Lp - the class Lp on the machine Zebra
               if the netname lp maps to Zebra)

Comments (indicated with a "--") can be used at the beginning or end
of a line.

If the NetNam is the name of the local machine the class file will contain
the simple name of the class indicating the the class to be defined locally
to that machine.

The configuration file should be identical on all machines.  This will
allow the movement of printer queues and printers among machines without
update of the configuration file.

The directory Network_Printing contains a procedure Network_Print which
will print any object (ada, text, output window, mail message, mailbox, etc).
on a laser printer.  I will also print objects located on other machines by
first ftp'ing the object over to the local machine, then queing it for
printing.  This procedure could be addapted to work with lineprinters
by modifying the options sent to the Queue.Print command embedded in
Network_Print.