GED is an editor dealing with a special kind of objects:
graphs, also known as networks. Not only can GED edit a graph,
but it can also compute some invariants associated to the graph.
GED can be used on a variety of machines and operating systems,
due to the extensive use of the multiplatform GUI library
wxWindows (see below). Thus GED works on PC (MSWindows 3.x,
MSWinNt), and on UNIX (currently sun4 with SunOS 5.4, and