A goal that we met with the 1992 CD-ROM version of this book was to give the user a full copy, not only of the book, but of all the software that built the book including not only the seismic data processing codes but also the word processing, the data, and the whole superstructure. Although we succeeded for a while having a book that ran on machines of all the major manufacturers, eventually we were beaten down by a host of incompatibilities. This struggle continues. With my colleagues, we are now working towards having books on the World Wide Web where you can grab parts of a book that generates illustrations and modify them to create your own illustrations.