Many people at the University of Arizona and elsewhere have contributed to the x-kernel . They include Andy Bavier, Mats Bjorkman, Lawrence Brakmo, Peter Druschel, Norm Hutchinson, Hasnain Karampurwala, Ed Menze, Sandra Miller, David Mosberger-Tang, Erich Nahum, Sean O'Malley, Hilarie Orman, Larry Peterson, Rich Schroeppel, David Yates, and Andrey Yeatts. Many others have contributed protocols, as noted in the Appendix.
Our work with the x-kernel has been supported over the years by several different organizations and companies, including the National Science Foundation (through grants CCR-8811423, IRI-9015407, CCR-9102040, and NCR-9204393), the Advanced Research Projects Agency (through contracts DABT63-91-C-0030, DABT63-94-C-0002, and DABT63-95-C-0075), the National Computer Security Center (through University research grant MDA904-92-C-515), Sun Microsystems, and Digital Equipment Corporation, Intel, and Hewlett-Packard.