The New York Public Library has a penchant for coining amusing acronyms for its services. These acronyms are usually related to cats in some way, referencing the huge stone lions outside the Central building on 5th Avenue that also serve as the library's logo; as a not-quite-nodeworthy example, the NYPL's internal webpage is called LAIR - Library-wide Access to Internal Resources. It's not nodeworthy because it's inaccessable outside the Library. Sorry guys. :)
LEO stands for "Library Entrance Online, and is the companion database to CATNYP - CATNYP serves the research libraries, LEO serves the branch libraries. It includes records for all eighty-five local branches, encompassing 1,000,000 titles and the status of 6,000,000 holdings. LEO can be accessed here: http://webpac.nypl.org/leo.html