Books in the library are classified and organized on our shelves by Library of Congress Classification (LOC). This classification is a way of organizing and shelving things based on different subjects. A book's LOC call number is usually found lower part of a book's spine. It is a series of letters and numbers arranged in specific ways. Library users may often be familiar with different classification systems such as the Dewey Decimal Classification (DDC). Typically, you will find that college and university libraries, as well as other research institutions, utilize the LOC system.
It can be intimidating at first, but with just very little practice, you will be able to find just about anything in the library with ease!