OCLC is a nonprofit global library cooperative that began in 1967 and now serves over 30,000 member libraries. It facilitates cataloging, interlibrary loans, and other services through products like WorldCat, the world's largest library catalog. OCLC is governed by a board of trustees and provides several services, including WorldCat, WorldShare, a library management system, and tools for electronic collection management, digital collection management, and cataloging.