OBJ (Wavefront OBJ) is a text-based file format for 3-D geometry. It was originally developed for the Wavefront Advanced Visualizer software. Now, it is a popular interchange format.

It encodes 3-D geometric data as points, lines, and polygons.  It supports face coloring.

The plottools[importplot] and plottools[exportplot] commands can be used for data exchange between this format and Maple 3-D plots.

The general-purpose commands Import and Export also support this format.

$\mathrm{Import}\left(''example/gear.obj''\,\mathrm{base}=\mathrm{datadir}\right)$