Some Linux references on available GPIB drivers and HPGL format:

From TclTk application list (this list is from 1995!):

What: IEEE 488 GPIB board driver
Where: <URL:ftp://koala.chemie.fu-berlin.de/pub/linux/LINUX-LAB/IEEE488/
Description: Manipulate GPIB boards using a modified wish shell with
        GPIB commands.  Lots of new Tk widgets are available for
        writing measurement software.  Works with Tcl 7.3 or 7.4.
Contact: <URL:gpib-request@koala.chemie.fu-berlin.de> (GPIB admin
requests)

From hardware compatibility howto:

22.10 Data acquisition

   The Linux Lab Project site collects drivers for hardware dealing with
   data acquisition, they also maintain some mailing lists dealing with
   the subject.

     * Linux Lab Project
       http://www.llp.fu-berlin.de/

HPGL support:

Gnuplot drives a HP7454A plotter directly

'convert' will convert hpgl into many formats like Post Script and gif

There are more conversion programs that support hpgl. Note that these
links are from my own search engine. There should be fresher links on the
internet.

Peter

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