Jabka is an object oriented three-dimensional computer graphics modeling and rendering package initially developed at Williams College by Donald House together with numerous students. It is now maintained at the Visualization Laboratory, Texas A&M University. Jabka runs on Unix/X-Windows workstations and Macintosh computers. It provides programmable model building via a subset of the Scheme programming language, a wireframe previewer that works under interactive control, a collection of renderers that can produce color shaded images from the model, and a variety of other 3D and 2D graphics tools. The following documentation provides a complete description of Jabka.