CB

History of Civilization

CC

Archaeology

CD

Diplomatics. Archives. Seals

CE

Technical Chronology. Calendar

CJ

Numismatics

CN

Inscriptions. Epigraphy

CR

Heraldry

CS

Genealogy

CT

Biography

11-143

America

151-889

United States

11-143

America

151-889

United States

GA

Mathematics geography. Cartography

GB

Physical geography

GC

Oceanography

GE

Environmental Sciences

GF

Human ecology. Anthropogeography

GN

Anthropology

GR

Folklore

GT

Manners and customs (General)

GV

Recreation. Leisure

H

Social sciences (General)

HA

Statistics

HB

Economic theory. Demography

HC

Economic history and conditions

HD

Industries. Land use. Labor

HE

Transportation and communications

HF

Commerce

HG

Finance

HJ

Public finance

HM

Sociology (General)

HN

Social history and conditions. Social problems. Social reform

HQ

The family. Marriage. Women

HS

Societies: secret, benevolent, etc.

HT

Communities. Classes. Races

HV

Social pathology. Social and public welfare. Criminology

HX

Socialism. Communism. Anarchism

J

General legislative and executive papers

JA

Political science (General)

JC

Political theory

JF

Political institutions and public administration - General

JK

Political institutions and public administration - United States

JL

Political institutions and public administration - Canada, West Indies, Mexico, Central and South America

JN

Political institutions and public administration - Europe

JQ

Political institutions and public administration - Asia, Arab countries, Islamic countries, Africa, Atlantic Ocean islands, Australia, New Zealand, Pacific Ocean islands

JS

Local government. Municipal government

JV

Colonies and colonization. Emigration and immigration. International migration

JX (obsolete)

International law, see KZ

JZ

International relations

K

Law in general. Comparative and uniform law. Jurisprudence

KBR

History of canon law

KBU

Law of the Roman Catholic Church. The Holy See

KD-KDK

United Kingdom and Ireland

KDZ

America. North America

KE

Canada

KF

United States

KG

Latin America - Mexico and Central America - West Indies. Caribbean area

KH

South America

KJ-KKZ

Europe

KL-KWX

Asia and Eurasia, Africa, Pacific Area, and Antarctica

KZ

Law of nations

L

Education (General)

LA

History of education

LB

Theory and practice of education

LC

Special aspects of education

LD

Individual institutions - United States

LE

Individual institutions - America (except United States

LF

Individual institutions - Europe

LG

Individual institutions - Asia, Africa, Indian Ocean islands, Australia, New Zealand, Pacific Islands

LH

College and school magazines and papers

LJ

Student fraternities and societies, United States

LT

Textbooks

ML

Literature on music

MT

Musical instruction and study

N

Visual arts

NA

Architecture

NB

Sculpture

NC

Drawing. Design. Illustration

ND

Painting

NE

Print media

NK

Decorative arts

NX

Arts in general

P

Philology. Linguistics

PA

Greek language and literature. Latin language and literature

PB

Modern languages. Celtic languages

PC

Romanic languages

PD

Germanic languages. Scandinavian languages

PE

English language

PF

West Germanic languages

PG

Slavic languages. Baltic languages. Albanian language

PH

Uralic languages. Basque language

PJ

Oriental languages and literatures

PK

Indo-Iranian languages and literatures

PL

Languages and literatures of Eastern Asia, Africa, Oceania

PM

Hyperborean, Indian, and artificial languages

PN

Literature (General)

PQ

French literature - Italian literature - Spanish literature - Portuguese literature

PR

English literature

PS

American literature

PT

German literature - Dutch literature - Flemish literature since 1830 - Afrikaans literature - Scandinavian literature - Old Norse literature: Old Icelandic and Old Norwegian - Modern Icelandic literature - Faroese literature - Danish literature - Norwegian literature - Swedish literature

PZ

Fiction and juvenile belles lettres

Q

Science (General)

QA

Mathematics

QB

Astronomy

QC

Physics

QD

Chemistry

QE

Geology

QH

Natural history - Biology

QK

Botany

QL

Zoology

QM

Human anatomy

QP

Physiology

QR

Microbiology

R

Medicine (General)

RA

Public aspects of medicine

RB

Pathology

RC

Internal medicine

RD

Surgery

RE

Ophthalmology

RF

Otorhinolaryngology

RG

Gynecology and obstetrics

RJ

Pediatrics

RK

Dentistry

RL

Dermatology

RM

Therapeutics. Pharmacology

RS

Pharmacy and materia medica

RT

Nursing

RV

Botanic, Thomsonian, and eclectic medicine

RX

Homeopathy

RZ

Other systems of medicine

SB

Plant culture

SD

Forestry

SF

Animal culture

SH

Aquaculture. Fisheries. Angling

SK

Hunting sports

T

Technology (General)

TA

Engineering (General). Civil engineering

TC

Hydraulic engineering. Ocean engineering

TD

Environmental technology. Sanitary engineering

TE

Highway engineering. Roads and pavements

TF

Railroad engineering and operation

TG

Bridge engineering

TH

Building construction

TJ

Mechanical engineering and machinery

TK

Electrical engineering. Electronics. Nuclear engineering

TL

Motor vehicles. Aeronautics. Astronautics

TN

Mining engineering. Metallurgy

TP

Chemical technology

TR

Photography

TS

Manufactures

TT

Handicrafts. Arts and crafts

TX

Home economics

U

Military Science (General)

UA

Armies: organization, distribution, military situation

UB

Military administration

UC

Maintenance and transportation

UD

Infantry

UE

Cavalry. Armor

UF

Artillery

UG

Military engineering. Air forces

UH

Other services

V

Naval Science (General)

VA

Navies: Organization, distribution, naval situation

VB

Naval administration

VC

Naval maintenance

VD

Naval seamen

VE

Marines

VF

Naval ordinance

VG

Minor services of navies

VK

Navigation. Merchant marine

VM

Naval architecture. Shipbuilding. Marine engineering.