Every book in the library has a unique call number that indicates where it is shelved. Just as a house address tells where exactly a house is located on a street, a call number tells us where exactly on the shelves we can expect to find the book. Call numbers at Owen Library and the University Library System are based on the Library of Congress Classification scheme (LCC). LCC is an alphanumeric scheme, i.e., it uses both letters and numbers.
LCC numbers are read from top to bottom.
Look for the letters first, on the top line: HA. Read in alphabetical order, A-Z.
Then look at the whole number on the next line: 1625. Read in numeric order, 1-9999.
Then look at the letter(s) after the dot: O. Again, read in alphabetical order.
Then look at the decimal number: 87. Hint: read left to right numerically; nothing comes before something.
Last, you will see the year the book was published: 1999. Earliest date (or no date) comes first, if the rest of the call number is identical.
DON'T FORGET: Read the number before the dot as a whole number. Read the number after the dot as a decimal. So .A52 comes before .A6.
The four books above are in the correct order.
The complete list of classes & subclasses and the subjects they reperesent in the Library of Congress Classification scheme is here: http://www.loc.gov/catdir/cpso/lcco/lcco.html
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