begun in 1968, is still running today at the LDs Hospital in Salt Lake City innovations are continually added while commercial systems struggle to rep- licate functions that HELP has had for almost half a century. Homers other contributions are far too numerous to recount here, but you will find them described in no less than six different chapters of this book. Homer's contributions go far beyond merely the scientific foundation of bi medical informatics. He also provided extensive leadership to define informatics as a separate academic field. He accomplished this in many settings: locally by founding the first degree-granting informatics department at the University of Utah, nationally as the President of the American College of Medical Informatics, nd internationally as the founding editor of the well-known and influential jour- nal Computers and Biomedical Research (now the Joumal of Biomedical Informatics). But perhaps his greatest impact is the generations of researchers and trainees that he personally inspired who have gone on to mentor additional researchers and trainees who together are the life blood of biomedical i ics. Homer's true influence on the field is therefore incalculable. just consider the hows his lineage of professional influence on 52 of us.K convenience sample of this book's 60 chapter co-authors: the following diagram Both of us were privileged to have many professional and personal inter actions with Homer and we were always struck by his enthusiasm, energy, humor, generosity, and integrity. In 1994, Homer received the American College of Medical Informatics'highest honor, the Morris F Collen Award of Excellence. We are proud to have this opportunity to add to the recognition of Homers life and career with this dedication James j. cimino Edward h. shortliffe Puter Salvin Hadad Owe Jams Briey Douglas K On Paras Dev Pnip Payne Michad Chane 2 Paul Clayton and Peter Szolovits provide important connections between Homer Warmer and ten coauthors but, while they are informatics leaders in their own right, they are not contributors to this edition of this bookbegun in 1968, is still running today at the LDS Hospital in Salt Lake City; innovations are continually added while commercial systems struggle to rep￾licate functions that HELP has had for almost half a century. Homer’s other contributions are far too numerous to recount here, but you will fi nd them described in no less than six different chapters of this book. Homer’s contributions go far beyond merely the scientifi c foundation of bio￾medical informatics. He also provided extensive leadership to defi ne informatics as a separate academic fi eld. He accomplished this in many settings; locally by founding the fi rst degree-granting informatics department at the University of Utah, nationally as the President of the American College of Medical Informatics, and internationally as the founding editor of the well-known and infl uential jour￾nal Computers and Biomedical Research (now the Journal of Biomedical Informatics ). But perhaps his greatest impact is the generations of researchers and trainees that he personally inspired who have gone on to mentor additional researchers and trainees who together are the life blood of biomedical informat￾ics. Homer’s true infl uence on the fi eld is therefore incalculable. Just consider the convenience sample of this book’s 60 chapter co-authors: the following diagram shows his lineage of professional infl uence on 52 of us. 2 Both of us were privileged to have many professional and personal inter￾actions with Homer and we were always struck by his enthusiasm, energy, humor, generosity, and integrity. In 1994, Homer received the American College of Medical Informatics’ highest honor, the Morris F Collen Award of Excellence. We are proud to have this opportunity to add to the recognition of Homer’s life and career with this dedication. James J. Cimino Edward H. Shortliffe 2 Paul Clayton and Peter Szolovits provide important connections between Homer Warner and ten coauthors but, while they are informatics leaders in their own right, they are not contributors to this edition of this book. Homer R. Warner G. Octo Barnett Edward H. Shortliffe Paul C. Tang Blackford Middleton Mark A. Musen Daniel L. Rubin Nigam Shah Holly Jimison Robert A. Greenes Suzanne Bakken Patricia Dykes Kevin B. Johnson Russ B. Altman Jessica Tenenbaum Sean D. Mooney Parvati Dev Mark E. Frisse David W. Bates Robert Rudin Jonathan Silverstein William Hersh Peter Embi William A. Yasnoff James J. Cimino Vimla L. Patel David R. Kaufman Clement J. McDonald Paul D. Clayton Carol Friedman George Hripcsak Adam Wilcox Noémie Elhadad Justin B. Starren Philip Payne Michael Chiang Lynn Vogel Scott Narus Stanley M. Huff Reed M. Gardner Scott Evans David Vawdrey W. Edward Hammond Ian Foster Terry Clemmer Roger B. Mark Randolph A. Miller Judy G. Ozbolt Valerie Florance Charles P. Friedman Douglas K. Owens James Brinkley Peter Szolovits Issac Kohane Kenneth Mandl Kenneth W. Goodman