American Physical Society publications serve the international physics community with peer-reviewed research journals, news and commentary about the latest research published in the Physical Review Journals, news about and for members, and information about physics and its place in the world. The Physical Review Journal collection of 13 peer-reviewed research journals includes Physical Review Letters , Physical Review X , Physical Review , and Reviews of Modern Physics . Product characteristics an equal item must meet to be considered : •· Full-text online access (where applicable) to journal articles in optics and physics, in either downloadable PDF or HTML format (PDF is preferred). •· Must be able to provide journals similar in scope to those listed in the product description. •· All graphical figures and citations of the original full-text article must be available within the digital document (object) that stands for that article. •· Search interface that includes numerous primary categories and ability to perform keyword and other specialized topical queries for effective searches. •· Individual account creation for saved searches and alerts. •· IP authentication (institutional multi-user, single campus subscription). •· Librarian-accessible COUNTER-compliant usage data for searches and downloads.