A call number is like an address; it is an alpha-numeric code that tells you where a book is located on the shelf. Each book has its own unique call number which is attached on or near the book's spine. A book's call number also appears in the library's online catalogue entry. Books are sorted alphabetically first, then numerically.

To see which call numbers are located on what floors in both the Porter and Davis libraries please refer to our library floor plans

Signs with the call numbers by floor are posted beside the elevators at Dan Porter library and on the stacks in both Davis and Dana Porter libraries.