AE Encyclopedias

AB Dictionaries

AI Indexes

AY Yearbooks, Almanacs

B Philosophy, Psychology, 

   Religion

BC Logic

BF Psychology

BJ Ethics

BL Religions/ Mythology

BS Bible

BT Doctrinal Theology

BV Practical Theology

BX Denominations & Sects

C Auxiliary Sciences of 

   History

CB History of       civilization

CR Heraldry

CT Biography (general)

D History: General & Old 

   World

DA Great Britain

DC France

DD Germany

DJK Eastern Europe

DK Russia

DP Spain

DS Asia

DT Africa

DU Oceana (South Seas)

51-99 Indians

186 – 199 Colonial

201 – 298 Revolution

456 – 655 Civil War

740 - 20th Century

1 – 975 U.S. Local

1421 – 1577  

Central America

1601 – 2183 West Indies

2201 – 2239 South America (general)

G Geography, Anthropology, 

    Recreation

GN Anthropology

GR Folklore

GT Manners & Customs

GV Recreation

H Social Sciences

HA Statistics

HB Economics

HD Land, Agriculture, Industry

HE Transportation &           Communication

HF Commerce

HG Finance

HJ Public Finance

HM Sociology

HN Social history, Social problems

HQ Family, Marriage, Woman

HS Societies

HT Communities, Classes, Races

HV Social & public welfare

HX Socialism, Communism, Anarchism

J Political Science

JA Collections & general

JC Political theory

JF Constitutional history

JK United States

JS Local government

JX International law

K Law

KF Law of the U.S.

KFF Florida law

L Education

LA History of Education

LB Theory & practice

LC Special aspects

M Music

ML Literature of music

MT Music instruction

N Fine Arts

NA Architecture

NB Sculpture

NC Drawing. Design

ND Painting

NE Print media

NK Decorative,Applied  arts

 

P Language and Literature

PA Classical languages

PC Romance languages

PE English

PN Literary History

PQ Romance literatures

PR English literatures

PS American literatures

PT Germanic literatures

PZ Fiction. Juvenile lit.

Q Science

QA Mathematics. Computer programs.

QB Astronomy

QC Physics

QD Chemistry

QH Natural history

QK Botany

QL Zoology

QM Human anatomy

QP Physiology

QR Microbiology

R Medicine

RA Public aspects

RC Internal. Practice.

RM Therapeutics.

Pharmacology

RS Pharmacy

RT Nursing

RZ Other systems

S Agriculture

SD Forestry
SH Aquaculture

T Technology

TD Environmental

TR Photography

TS Manufactures

TX Home Economics

U Military Science

ZA Internet.

World Wide Web.