Computing Notes

Most of the examples in this book were executed on a FastData 486 machine running at 33 MHz with 8 MB of memory. I initially used Release 6.04 SAS software running under the DOS operating system, but I later switched to Release 6.08 under the Windows operating system. The examples requiring Release 6.10 were run on a Power Macintosh 7100/80 with 16 MB of memory using a preproduction release of SAS. Occasionally, I report comparisons of computing times for different procedures, options, sample sizes, and program code. These comparisons should only be taken as rough illustrations, however, since computing time is heavily dependent on the software and hardware configuration.