Contained on the CD-ROM distribution are two interactive programs, ed1D and Zplane. I originally wrote these programs in Sunview, an interactive software development platform from Sun Microsystems. Fortunately, Steve Cole converted them to the X Window system, using the X toolkit and Xlib graphics, so they are now available on machines from many manufacturers. Unfortunately, in 1998, we do not have them compiled for our main machines at SEP, linux PC's and SGI.