Jack O'Gorman is a Reference and Instruction Librarian and Associate Professor at the University of Dayton's Roesch Library, where he is also responsible for collection development and liaison work in engineering, physics, math, and geology. With more than thirty years' experience in university, government, and business libraries, he has an in- depth knowledge of reference sources. He chaired the editorial board of Reference Books Bulletin from 2001 to 2004 and continues as a member of that board. He has served on the award committees for Outstanding Reference Sources and the Dartmouth Medal,