The mid-1990s sparked a huge increase in the popularity of the Internet and consequently, the popularity of e-resources. Initially they were novelties, but it soon became apparent that they would change the way research was conducted, and in turn, force libraries to reevaluate how they provided access to information. Now, more than ten years later, e-resources, specifically e-journals, have become a ubiquitous part of library collections. As a result of the migration from print resources to their electronic counterparts, serials catalogers have been faced with many new and pressing challenges in their mission to provide users with accurate and timely access to information. Among these challenges are the inadequacy of the existing cataloging code, treatment concerns related to multiple versions of a single work, the emergence of new (and hopefully improved) standards to respond to user needs, and the quest for efficiency. This chapter examines the cataloging community’s recent efforts to ease the transition from print to e-resources.