Thanks to The Weather Channel; Wind River Systems, Inc.; and Berkeley Software Design, Inc. for funding some of the SMPng development as well as this paper. Thanks also to BSDi for donating their SMP code from the BSD/OS 5.0 branch. Special thanks are due to those who helped review and critique this paper including Sam Leffler, Robert Watson, and Peter Wemm. Finally, thanks to all the contributors to the SMPng Project including Jake Burkholder, Matt Dillon, Tor Egge, Jason Evans, Brian Feldman, Andrew Gallatin, Greg Lehey, Jonathan Lemon, Bosko Milekic, Mark Murray, Chuck Paterson, Alfred Perlstein, Doug Rabson, Robert Watson, Andrew Reiter, Dag-Erling Sm rgav, Seigo Tanimura, and Peter Wemm.