How to Study

There is even further subdivision. Mathematics is given its own
number in the 500 series—510. But specific subjects within mathe-
matics are further classified: 511 is arithmetic, 512 is algebra, and
so on.

Finally, to simplify your task even more, the last two digits in the
Dewey code signify the type of book:

01 Philosophy of

02 Outlines of

03 Dictionary of

04 Essays about

05 Periodicals on

06 Society transactions and proceedings

07 Study or teaching of

08 Collections

09 History of

If your library doesn’t use the Dewey system, it probably is organized
according to the Library of Congress system, which uses letters
instead of numbers to denote major categories:

A General works (encyclopedias and other reference)

B Philosophy, Psychology, and Religion

C History: Auxiliary sciences (archeology, genealogy, etc.)

D History General, non-American

E American history (general)

F American history (local)

G Geography/Anthropology

128 How to Study