W e review, classify, consolidate, and synthesize the contributions to the expanding field of e-business that have been published in Production and Operations Management. We classify e-business research in the following four categories: (1) e-auctions, (2) radio frequency identification, (3) e-business system design, and (4) competition, conflict, collaboration, and coordination (C 4 in e-business). We identify important research themes, research methodologies, and research techniques within each of these categories. We also provide directions for future research and discuss the managerial implications of the e-business research reported in our paper.