The Library of Congress (LC) Classification System.

The RCC Library organizes books and other materials on shelf according LC classification system. This is the same system used by the Boston Public Library and most college libraries. LC call numbers are typed on labels which are then attached to the spines of every book.
To see a description of the classes and sub-classes of the LC classification system, select L.C. Classification System.
Since the LC classification system organizes books by subject, it is possible to browse the shelves and find similar books together.

Each call number is made of several parts. Here's an example:

The call numbers are in alpha-numeric order starting with the first line and working down. There is a decimal point at the beginning of the third line and the numbers in it are decimal not whole numbers. Look at these three similar call numbers. They are in correct order because the third lines are treated as decimals.

Starting with the call number from the online catalog, it is possible to find most books on shelf. Follow these methodical steps to find your book quickly:

	Look in the correct location, Stacks, Reference, Reserves, etc.
	Within the location, find the correct range of shelving. There are signs at the end of each range which tell the beginning and ending call numbers shelved there.
	Within the correct range, look at one call number in the first section of shelving, then one in the next section until you find the correct section.
	Within the correct section, check one call number on the first shelf and then the next until you find the correct shelf.
	Find the correct book on the shelf.