B

Philosophy (General)

BC

Logic

BD

Speculative Philosophy

BF

Psychology

BH

Aesthetics

BJ

Ethics

BL

Religions

BM

Judaism

BP

Islam, Bahaism, Theosophy, etc.

BQ

Buddhism

BR

Christianity (General)

BS

The Bible & Exegesis

BT

Doctrinal theology

BV

Practical Theology

BX

Denominations and Sects

CB

History of civilization and culture (General)

CC

Archaeology (General)

CD

Diplomatics – Archives – Seals

CE

Technical Chronology – Calendar

CJ

Numismatics

CN

Epigraphy – Inscriptions

CR

Heraldry

CS

Genealogy

CT

Biography

D

History

DA

Great Britain

DB

Austria

DC

France

DD

Germany

DE

The Mediterranean Region

DF

Greece

DG

Italy

DH-DJ

Belgium – Holland –Luxembourg

DK

Russia

DL

Northern Europe – Scandinavia

DP

Spain – Portugal

DR

Eastern Europe –Balkan Peninsula – Turkey

DS

Asia

DT

Africa

DU

Oceania (South Seas)

DX

Gypsies

E

America

F

United States

G

Geography (General)

GA

Mathematical Geography – Cartography

GB

Physical Geography

GC

Oceanography

GF

Anthropogeography

GN

Anthropology

GR

Folklore

GT

Manners and Customs (General)

GV

Recreation

H

Social sciences (General)

HA

Statistics

HB

Economics

HC

Economic history & conditions national products

HD

Land Agriculture Industry

HE

Transportation & Communication

HF

Commerce

HG

Finance

HJ

Public finance

HM

Sociology (General & theoretical)

HN

Social history; Social problems; Social reform

HQ

Social groups

HS

Societies: Secret, Benevolent, etc., Clubs

HT

Communities classes Races

HV

Social Psychology Social & public welfare

HX

Socialism Communism Anarchism

JA

Collections and general works

JC

Political theory; Theory of the state

JF

General works Comparative works

JK

United States

JL

British –American – Latin American

JN

Europe

JQ

Asia- Africa- Australia- Oceania

JS

Local Government

JV

Colonies & Colonization -Emigration

JX

International law -International Relations

K

Law (General)

KF

Law of the United States

KFA-KFW

Law of individual states

KFX

Law of individual cities, A-Z

KFZ

Law of individual territories

L

Education (General)

LA

History of Education

LB

Theory and practice of education

LC

Special aspects of education

LD

United States

LE

American, except United States

LF

Europe

LG

Asia –Africa- Oceania

M

Music (General)

ME

Orchestral Music

ML

Literature of music

MT

Music instruction and study

N

Visual arts

NA

Architecture

NB

Sculpture

NC

Drawing, Design, Illustration

ND

Painting

NE

Print Media

NK

Decorative Arts; Applied arts; Decoration

NX

Arts in General

P

Philology and linguistics (General)

PA

Classical languages and literature

PB

General works

PC

Romance languages

PD

Germanic Languages

PE

English

PF

West Germanic

PG

Slavic, Baltic, Albanian languages & literature

PH

Uralic, Basque languages & literature

PJ

Oriental languages & literature

PK

Indo-Iranian

PL

Languages & literature of East Asia, Africa

PM

American Indian Languages

PN

Literary History and collections

PQ

Romance literature

PR

British literature

PS

American literature

PT

Germanic literature

PZ

Fiction and Juvenile

Q

Science (General)

QA

Mathematics, Computer Science

QB

Astronomy

QC

Physics

QD

Chemistry

QE

Geology

QH

Biology

QK

Botany

QL

Zoology

QM

Human Anatomy

QP

Physiology

QR

Microbiology

R

Medicine (General)

RA

Public  & Environmental Health

RB

Pathology

RC

Internal medicine

RD

Surgery

RE

Ophthalmology

RG

Gynecology and obstetrics

RJ

Pediatrics

RK

Dentistry

RL

Dermatology

RM

Therapeutics  Pharmacology

RS

Pharmacy and materia medica

RT

Nursing

RZ

Other systems of medicine

SB

Plant culture

SF

Animal culture

SH

Veterinary Medicine

T

Technology (General)

TA

Engineering (General)

TH

Building Construction,

TJ

Mechanical Engineering

TK

Electrical Engineering, Electronics

TL

Motor Vehicles. Aeronautics

TP

Chemical Technology

TR

Photography

TS

Manufacturers

TT

Handicrafts. Arts & Crafts

TX

Home Economics