What is / was Medusa

Medusa, was used mainly as a 2D drafting software. It was similar to drawing on paper in that you started out with a pre-formatted sheet size, set your drawing scale and then made your drawing. There were 2 basic kinds of lines. Regular non-clump lines and clump lines. With clump lines, a part could be drawn in a 2D view as an individual part or (clump of lines). This 2D part (clump) could then be selected as a unit and moved around, saved, deleted or changed. Different parts (clumps) could be joined together into an assembly (a higher level clump) and that could then be moved around as a unit.