Brian Jepson is an O'Reilly editor, programmer, co-author of all editions of Mac OS X for Unix Geeks, and co-author with Dave Taylor on the Jaguar and Panther editions of Learning Unix for Mac OS X. He's also a volunteer system administrator and all-around geek for AS220, a non-profit arts center in Providence, Rhode Island. AS220 gives Rhode Island artists uncensored and unjuried forums for their work. These forums include galleries, performance space, and publications. Brian sees to it that technology, especially free software, supports that mission.

Ernest Rothman is an Associate Professor of Mathematics and Chair of the Mathematical Sciences Department at Salve Regina University (SRU). Like Brian, Ernie has co-authored every edition of Mac OS X for Unix Geeks. Ernie holds a PhD in Applied Mathematics from Brown University and held positions at the Cornell Theory Center in Ithaca, New York, before coming to SRU. His academic interests are in scientific computing, computational science, and applied mathematics education. As a long-time Unix aficionado, Ernie has enjoyed tinkering with Mac OS X since the day it was first released. You can keep abreast of his latest activities at http://homepage.mac.com/samchops.