This database contains records on the holdings of almost 100,000 libraries worldwide. WorldCat describes items on thousands of subjects and published in any year since about 1000. The items cited are owned by libraries around the world. Types of publications include: books, journals, maps, slides, computer datafiles, magazines, musical scores, sound recordings, computer programs, manuscripts, newspapers, videotapes, bibliographies, master's theses, doctoral dissertations, and software. Items not held by the University Libraries may often be requested on ILLiad (Interlibrary Loan).