HPGL Import for AutoCAD is a plug-in for AutoCAD 2000, 2000i, 2002 and 2004. This plug-in gives AutoCAD the ability to import geometric data from HPGL Plot (PLT) files.

HPGL is the Hewlett Packard Graphics Language designed for specifying 2D graphical information for the HP range of plotters. It was not intended as an interchange format but some software suppliers use it as such. HPGL is a command set embedded in the ROM of pen plotters to help reduce the work required by applications programmers to create plotted output. HPGL uses two-letter mnemonics as instructions for drawing lines, circles, text, and simple symbols.

HPGL plot files contain information regarding the movement of the pen of the HP plotter. HPGL Import for AutoCAD converts these pen movements into AutoCAD entities and adds them to the contents of the currently opened AutoCAD drawing. HPGL Import for AutoCAD supports plot files created by drivers for the following plotters: 
Hewlett-Packard 7475A
Hewlett-Packard 7550A
Hewlett-Packard 7580B
Hewlett-Packard 7585B
Hewlett-Packard 7586B
Hewlett-Packard Draftmaster 1 (7595A)
Hewlett-Packard Draftmaster 2 (7596A)
Hewlett-Packard Draftpro (7570A)
Hewlett-Packard Draftpro-DXL (7575A)
Hewlett-Packard Draftpro-EXL (7576A)

HPGL Import for AutoCAD is very easy to use. It adds a new command to AutoCAD called "HPGLIN". Simply type "HPGLIN" at the AutoCAD command prompt and select a HPGL Plot (.plt) file to import.