We use the Library of Congress Classification system for our call numbers. The classification system arranges our book according to what they are about, so that books on the same topic are shelved together. Books are shelved in call number order, so you can find a specific book when you need it.
Call numbers are actually made up of letters and numbers that follow a pattern: a letter or letters, followed by a number, followed by one or two letter-number groups, followed by the year of publication. It's easiest if you break the call number into parts.
Call numbers start with one, two, or three letters, and are arranged alphabetically. Within each letter, single letters come before double and triple letters:
. . . B, BC, BD . . . K, KB, KC, KJ, KJA, KJC, KL, KLA, KM . . .
Following the letters is a 1-4 digit number, which may be followed by a decimal point and additional digits.
Examples: AE5, TP369, G2898.2
To the left of the decimal point, the number is treated like a regular number, in that single-digit numbers come before two-digit numbers, two-digit numbers before three-digit numbers, etc.
1, 3, 10, 23, 76, 145, 312, 760, 2756, 5790
If the number has a decimal point, you then compare the digits to the right of the decimal point from left to right, to figure out what comes next.
73, 73.1, 73.16, 73.2, 73.351, 73.36, 73.5
Next comes one or two letter-number groups consisting of a single letter and a number with one or more digits. Usually only the first group is shown with a decimal point in front of it, but both are read the same way – first by the letter, then by the number as if there was a decimal point to the left of it, as described in the section above.
The call number often ends with the year the book was published.
You might occasionally see something in a call number that isn't described above. But you should still be able to figure out where to find it using the same principles.
You might notice slight differences in the way a call number is shown on a computer screen (such as with spaces between parts of the call number) or on a book label (such as where parts of the call number are broken to the next line). But these will not affect the way you read the number..
The call number label on the book sometimes also has a volume or copy number printed on it.
When looking up a book in the library catalog, the Holdings Information gives you important details about the book's location and availability.
Our online library catalog, Hawaiʻi Voyager, shows you library materials at all UH campuses, even if you limit your search to books we have here at Leeward (if another library also has a copy of a book we have). In the example above, Honolulu also has a copy of this book, so make sure you're looking at the information for our copy.
In our library, our books are divided up into different collections, located in different parts of the library. Most of our books are in the General Collection. But many are in the Reference Collection, the Hawaiian/Pacific Collection, the Hawaiʻi-Pacific Resource Room, and other locations.
Write it down. Or use the "Text me this call number" feature. Or if you're searching the catalog on your phone, carry it with you to the bookshelves.
Go to the collection that has the book you want . See the library map to see where our collections are.
Collections are arranged in a continuous A-to-Z sequence in the order described in the section above. Look for signs on the ends of the bookshelves that tell you what range of call numbers is on each row of shelves.
Books are arranged left to right on the shelf, and top to bottom in a column of shelves.
Books have a call number label, usually near the bottom of the spine. Thin books have the label on the front cover, so you'll have to pull the book off the shelf a little bit to see it.
Some libraries are "closed shelf", meaning they don't let the public into the room where the books are kept. The call number was what was "called" back to the staff member who retrieved books that were requested.
It does the same thing. Dewey Decimal Classification is commonly used in public and K-12 school libraries. It covers a very broad range of topics, but doesn't go very deeply into specialized topics. Library of Congress Classification is used in most college and university libraries. If focuses on topics of scholarly research, and addresses very specialized topics.
The Library of Congress is a closed-shelf library, where trained staff retrieve the books. Their system focuses on precise classification of specialized works, rather than making it easy to find something on the shelf.