Columbia Cooper: Reading Call Numbers: Reading Call Numbers--Library of Congress Style

Check the chart near the elevators in Thomas Cooper Library to find out what call numbers are on which levels. A-D level 1, E-L level 2, N and P level 3, Q-Z level 4.

On each level near the elevators you'll find a floor plan.  See the floor plan maps for level 1, level 2, level 3, and level 4.

- Begin with the letter or letters.  A comes before AE which is before B, etc.

                       B 1                   BC 5                 BD 21              BF 1    

     Look at the end of the ranges to find the first and last call number on that row of shelves.  You are getting closer!

- Then by the numbers that come right after the letters.  The numbers are shelved in numeric order.

                 BF 1                 BF 11               BF 21             BF 112

- Then in alphabetical order and decimal order.  The call numbers below are arranged in correct order because .73 is smaller than .8

- There may be another line of letters and numbers.  If so, these will also be in alphabetical and then decimal order.

- Then by year of publication if one is given.

              BF21               BF 21

             .C8                   .C8

             .M4                  .M4

              1962               1990

Each book has a unique call number that identifies that particular book.

Call numbers are a code so materials on the same topic can be shelved together. 

Wonder what those beginning letters mean in a call number?  We've got a handout or there's more detailed information from the Library of Congress.