This page contains an outline of the one- and two-letter symbols for the call numbers used for most materials in the Ohio University Libraries.

Please note: The outline below also indicates general locations for browsing in Alden Library. Be forewarned, however, that many specific titles with these call numbers will be found elsewhere in the collection. Exact locations may be found by using ALICE.

A: General Works (6th floor)

AE Encyclopedias
AI Indexes
AM Museums
AP Periodicals
AS Academies and learned societies
AY Yearbooks,almanacs,directories

B: Philosophy, Psychology, Religion (6th floor)

B  History and systems of philosophy	
BC Logic		
BD Speculative philosophy	
BF Psychology	
BH Aesthetics	
BJ Ethics		
BL Religions, mythology, rationalism	
BM Judaism	
BP Islam, Bahaism, Theosophy	
BR Christianity (General)	
BS The Bible	
BT Doctrinal theology	
BV Practical theology	
BX Denominations and sects

C: Auxiliary Sciences of History (6th floor)

CB History of civilization and culture
CC Archaeology (General)	
CD Diplomatics, archives, seals	
CE Chronology	
CJ Numismatics	
CN Epigraphy	
CR Heraldry	
CS Genealogy	
CT Biography (General)

D: History – General and Eastern Hemisphere (6th floor, except as noted)

D History (General)
DA Great Britain
DB Austria, Czechoslovakia, Hungary	
DC France		
DD Germany	
DE Mediterranean, Greco-Roman world	
DF Greece		
DG Italy		
DH - DJ Netherlands, Belgium, Luxembourg	
DK Russia		
DL Northern Europe	
DP Spain, Portugal	
DQ Switzerland	
DR Eastern Europe; Turkey	
DS Asia 
   DS520-DS689 Southeast Asia (Southeast Asia Collection, 1st floor)
DT Africa		
DU Oceania, Australia, New Zealand	
DX Gypsies

E and F: History – Western Hemisphere (6th floor)

E   America (General),United States
F1-975 United States local history	
F1001-1140 Canada	
F1201-1392 Mexico	
F1401-3799 Central and South America, the Caribbean area 

G: Geography, Anthropology, Recreation (6th floor, except as noted)

G  Atlases, Globes, Maps (Map Collection, 5th floor)
GA Mathematical geography, cartography	
GB Physical geography	
GC Oceanography	
GF Human ecology	
GN Anthropology	
GR Folklore	
GT Manners and customs	
GV Sports and recreation
   GV1580-GV1799 Dance (Music/Dance Library)

H: Social Sciences and Business (6th floor)

H  Social sciences (General)	
HA Statistics	
HB Economic theory	
HC Economic history and conditions	
HD Land, agriculture, industry	
HE Transportation and communication
HF Commerce	
HG Finance	
HJ Public finance	
HM Sociology	
HN Social history	
HQ Social groups; the family, marriage, women		
HS Societies and clubs	
HT Communities, classes, races	
HV Social pathology, criminology, welfare	
HX Socialism, communism, anarchism

J: Political Science (6th floor)

J  Official documents	
JA Collections and general works	
JC Political theory	
JF Constitutional history and administration	
JK U.S. constitutional history	
JS Local government	
JV Colonization, emigration and immigration	
JX International law, international relations

K: Law (6th floor)

K  Law (General)	
KF United States law	
KFO1-599 Ohio law

L: Education (6th floor)

L  Education (General)	
LA History of education	
LB Theory and practice	
LC Special aspects	
LD Individual U.S. institutions	
LH College and school publications	
LJ Student fraternities and societies	
LT Textbooks (General)

M: Music (Music Dance Library, 5th floor of Music Building)

M  Music (General)	
ML Literature of music	
MT Music instruction and study

N: Fine Arts (Fine Arts Library, 3rd floor)

N  Visual arts (General)	
NA Architecture	
NB Sculpture	
NC Drawing, design, illustration	
ND Painting	
NE Print media	
NK Decorative arts, applied art	
NX Arts in general

P: Language and Literature (7th floor)

P  Linguistics	
PA Greek and Latin	
PB Modern European languages; Celtic languages	
PC Romance languages	
PD Old Germanic and Scandinavian languages	
PE English language	
PF Dutch, Flemish, German languages	
PG Slavic languages and literature	
PH Finno-Ugrian and Basque languages and literature	
PJ Middle Eastern languages and literature	
PK Indo-Iranian languages and literature	
PL East Asian, African, and Oceanic languages and literature	
PM American Indian; artificial languages	
PN Literature; literary history and collections
PQ Romance literature	
PR English Literature	
PS American literature	
PT Germanic literature	
PZ Children's literature

Q: Science (7th floor)

Q  Science (General)	
QA Mathematics	
QB Astronomy	
QC Physics	
QD Chemistry	
QE Geology	
QH Natural history (General)	
QK Botany		
QL Zoology	
QM Human anatomy
QP Physiology 
QR Microbiology 

R: Medicine (7th floor)

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	
RX Homeopathy	
RZ Other systems of medicine

S: Agriculture (7th floor)

S  Agriculture (General)	
SB Plant culture	
SD Forestry	
SF Animal culture	
SH Aquaculture, fisheries, fishing	
SK Hunting

T: Technology (7th floor, except as noted)

T  Technology (General)	
TA Engineering (General)	
TC Hydraulic engineering	
TD Environmental technology	
TE Highway engineering	
TF Railroad engineering	
TG Bridge engineering	
TH Building construction	
TJ Mechanical engineering and machinery	
TK Electrical engineering; electronics	
TL Motor vehicles; aeronautics; astronautics	
TN Mining engineering; metallurgy	
TP Chemical technology	
TR Photography	(Fine Arts Library, 3rd floor)
TS Manufactures	
TT Handicrafts; arts and crafts	
TX Home economics; cooking

U: Military Science (7th floor)

V: Naval Science (7th floor)

Z: Bibliography; Library Science (7th floor)