Program notes All of these programs work in R 1.7. The Ornaghi et al. (1999) example program works in S-Plus 6.1 without modification. The exact coverage program works in S-Plus 6.1 except for the Trellis plot section. Please note that R will run the exact coverage program for the n=40 and s=10 example in Section 5 in approximately 5 1/2 minutes, but S-Plus runs the program in approximately 1 1/2 hours! These times are for a 1.13GHZ and 512MB memory computer with Windows 2000.