HPGL

HPGL, or Hewlett-Packard Graphics Language, is a printer command language developed by Hewlett-Packard. It was originally designed for controlling HP's plotters and printers. HPGL is a vector graphics language, meaning it describes images as a series of mathematical commands for drawing lines, arcs, and other shapes, rather than as a grid of pixels. This approach makes it ideal for precise technical drawings, schematics, and logos that need to be scaled without loss of quality.

The language consists of a series of two-letter commands followed by parameters. For example, the 'PU' command moves the pen up, and 'PD' moves the pen down. Other commands control pen selection, line type, scaling, and cursor positioning. HPGL files are typically text-based and can be generated by CAD (Computer-Aided Design) software and other graphics applications.

While HPGL was widely used in the past, its prominence has declined with the rise of more versatile graphics formats like PDF and SVG, and the shift towards raster-based printing. However, it remains relevant in certain niche applications, particularly in industries that still rely on plotter technology or legacy CAD systems. Many modern graphics programs and plotters still offer support for importing or exporting HPGL files.