Discussion of the precise nature of the Information System discipline has raged for more than twenty years and continues fiercely today. The most interesting aspect of recent debate is not only the sharpness and depth of the arguments, but the diverse conclusions arrived at by participants. While very different, these have all been reached with the genuine aim of strengthening IS scholarship, and they all add to our specific understanding of the discipline in the last two decades. Edited by two of the most prominent academics in the field, Information Systems - The State of the Field brings together such perspectives along with wider contextual discussion to provide a fertile ground for reflection, learning and further debate. It includes articles from Izak Benbasat, Robert Galliers, Rudi Hirschheim, Heinz Klein, Suzi Iacono, Wanda Orlikowski, Gerry DeSanctis, Bob Zmud, Dan Robey, Kalle Lyytinen, John King, Sal March and Ron Weber, all of whom also provide a short original commentary of their views on this debate.