To find an item in the library, in addition to knowing the location and availability, you need to know its call number.

Each item in the ORU Library has its own unique call number that is 1) on a label that is usually taped on the spine of the book or other item and 2) listed in the library catalog record.

After you find an item in the library catalog, record the call number, go to the location in the library, and locate the item on the shelf.

The chart below provides examples of how books and other library materials are arranged alphabetically and numerically, from left to right on the shelves, according to the Library of Congress call number.

Top line - Items are arranged alphabetically by letters on the first call number line.
2nd line - Then, the second line is arranged in number order.
3rd line - The third line is a letter and decimal number line, arranged alphabetically by the letter then the decimal number

Call Number Ranges for Each Library Floor

• A-BX call numbers are on the 1st floor
• C-Z call numbers are on the 2nd floor

Note: Items in special collections will be located in the special collection.