1 PGPLOT
A powerful package of graphics subroutines written by T. J. Pearson 
of the Caltech Astronomy department. PGPLOT supports a wide range
of devices (see Supported_devices). However, the current configuration
supports only some of these devices, see Available_devices for the 
current list.

2 Available_devices
List of Current PGPLOT Device Drivers, as of  6-JAN-1993 21:36:38.01
 
GLDRIVER.FOR    HPGL Driver (tested on HP7475A plotter)         /HPGL
MFDRIVER.FOR    PGPLOT MetaFile                                 /FILE
NUDRIVER.FOR    Null device (no graphical output)               /NULL
PSDRIVER.FOR    PostScript device (landscape mode)              /PS
QMDRIVER.FOR    QUIC devices (QMS 800 etc) (landscape mode)     /QMS
QPDRIVER.FOR    QUIC devices (QMS 800 etc) (portrait mode)      /VQMS
TEDRIVER.FOR    Tektronix 4006/4010 storage-tube terminal       /TEK4010
TKDRIVER.FOR    Tektronix 4100 series                           /TK4100
VGDRIVER.FOR    HPGL Driver (tested on HP7475A plotter)         /VHPGL (portrait)
VPDRIVER.FOR    PostScript device. (portrait mode)              /VPS
VTDRIVER.FOR    DEC VT125, VT240, or VT241 terminal (REGIS)     /VT125

  The PGPLOT package can be configured for additional graphics devices,
  for information see file AAA-READ.ME in the PGPLOT drivers directory
2 Select_device
 Two graphic devices are usually defined for PGPLOT, a graphics 
 terminal type, if one is in use, for interactive graphics and a 
 hardcopy device type. The terminal type is saved in logical name
 PS_CRT, which has a number designating the terminal type.
 The hardcopy device is defined using logical names PS_HDEV,
 PS_HFILE and optionally PS_HCOM to provide post-processing, for
 example to queue the file for plotting. These names are usually
 defined in the PS_INIT.COM file (information on Customization,
 or refer to the printed documentation).
 
 Under certain circumstances, a user may be requested to enter
 a valid PGPLOT device designation (if the terminal type is 99, "?"
 or PS_HDEV has not been specified). A device is entered either 
 as 
	/dev
 or
	file/dev
 for example:
	/VT125           (Regis graphics will be sent to the terminal)
	VT.CODE/VT125    (Regis graphics will be sent to file VT.CODE)
	/QMS             (QMS-QUIC graphics will be written in a file,
	                 the name will be selected by the software)
 See the Available_device list for the currently defined PGPLOT 
 graphics devices.
