WRONG, WRONG, WRONG!!!
"Apple's three biggest federal customers are NASA, the Department of Energy, and the National Institutes of Health. At NASA, the biggest customers, as I recall, are NASA Goddard in Maryland and NASA Ames at Moffett Field in California. The Department of Energy list includes all of the major U.S. National Laboratories such as Los Alamos, Lawrence Livermore, Oak Ridge, and some minor ones. These sites typically have thousands of Macs. Of course, they also typically have tens of thousands of PCs."
Apples are, indeed, totally preferred by secretarial staff. I was talking about scientific applications. As an electrical engineer, my fondest memory was of a large flat-bed truck in our parking lot LOADED WITH JUNKED APPLE COMPUTERS of every description. We dumped them as a way of getting rid of having to support two platforms. Only the administrative staff was PO'ed. The engineering staff and tech-support were VERY HAPPY. But everyone loves whatever it is they are used to. Some people like to eat raw squid, I've heard. All opinions are valid, of course. : )