University of Łódź
The library of the University of Łódź is one of the biggest and most modern academic libraries in Central Europe. 
Its total collection amounts to 3 million volumes. The main part of the book collection is in library store-rooms. The remaining books and journals are placed in the reference sections: the Main Reading Room and Study Rooms. Registered users can use self checkout machines for lending and returning books in some collections. Apart from the Main University Library there are 106 branch libraries and their collections are adjusted to the scientific and didactic activities of the institutions. The number of registered library card holders is now over 20,000.
Harvard Library
The Harvard Library system comprises about 76 libraries, with more than 18 million volumes. It is the oldest library system in the United States and the largest university library and largest private library system in the world. Based on number of items held (including musical scores, maps, prints, recordings, etc.), it is the fifth largest library in the United States; based only on volumes (generally books), it is the third largest, after the Library of Congress and Boston Public Library.