The Library of Congress (LC) call number is the unique "address" of a book or other material. No two books have exactly the same call number.
LC call numbers begin with letters of the alphabet. These describe the broad subject heading that the book has been assigned.
The letters and numbers that follow serve to narrow down the subject. If you click D link at right, you'll see that D 767 is WWII.
D767.25 .H6 K68 2007 |
D767.25 .H6 K865 1986 |
D767.25 .H6 L48 1997 c.2 |
D767.25 H6 L5 |
D767.25 H6 L5 c.2 |
1. Read line 1 alphabetically
2. Read line 2 in straight numerical order
3. LIne 3 is tricky: it is a DECIMAL number, so L48 comes before L5
4. All subsequent numbers are also treated as decimals, even if there is no decimal point
5. The final C.2 means that we have 2 copies of the same book, and this is Copy 2.