Book Locations - Library of Congress Call Numbers

The University of Idaho Library, along with most academic libraries, classifies materials using the Library of Congress (LOC) system. This means you will find books on our shelves organized by their LOC call numbers. Below is a chart providing an overview of where the LOC classes are located on the library floors. They start with class “A” on the fourth floor and winding through the shelves all the way down to class “Z” on the second floor.

For more information check our Book Research Guide, our Floor maps, or the full Library of Congress classification outlines.

Fourth Floor (A - G)

4th Floor Map

A General works
B Philosophy, Psychology, Religion
B Philosophy
BF Psychology
BL-BX Religions, Mythologies
C-F History
CC Archaeology
DA-DR Europe
DS Asia, Middle East
DT Africa
DU Australia, Pacific Islands
E Indigenous History, General U.S. History
F U.S. (States), Canada, Mexico, Central and South America
G Geography, Anthropology, Recreation
GB Geography, Water Resources
GC Oceanography
GE Environmental Studies
GF Human Ecology, Conservation
GN Anthropology
GR-GT Folklore, Culture, Customs
GV Sports, Dance, Games, Outdoor Recreation

Third Floor (H - S)

3th Floor Map

H Social Sciences  
    HB Economics
    HD Labor and Industry
    HE Communications, Broadcasting
    HF-HG Commerce, Finance, Banking
    HM Sociology
    HQ Women's Studies, Gender Studies, Sexuality
    HT Communities, Social Organization
    HV Social Services, Criminal Justice
J Political Science
K Law  
L Education  
    LB Elementary, Secondary, Higher Education
    LC Social Aspects of Education
M Music  
    M Sheet Music
    ML Music Literature
    MT Music Instruction and Study
N Fine Arts  
    NA Architecture
    NC Drawing, Graphic Arts, Illustration
    ND Painting
    NK Textile Arts, Ceramics, Metalwork, Interior Design
P Language and Literature  
    PA Classical Languages and Literature
    PC Romance Languages
    PE English Language
    PF Germanic Languages
    PL Asian Languages and Literature
    PM Indigenous American Languages
    PN Film, Television, Theatre, Journalism
    PR English Literature
    PS American Literature
    PZ Children's Literature
Q Science  
    QA Mathematics, Statistics, Computer Science
    QB Astronomy
    QC Physics, Climate Science
    QD Chemistry
    QE Geology
    QH Biology, Natural History, Conservation
    QK Botany
    QL Zoology
    QR Microbiology
R Medicine  
    RA Public Health
    RC Neuroscience, Sports Medicine
S Agriculture  
    SB Plant/Crop Science, Landscape Architecture, Gardening
    SD Forestry
    SF Animal Science
    SH Fisheries, Aquaculture
    SK Wildlife Studies

Second Floor (T - Z)

2th Floor Map

T Technology  
    TA-TC Engineering, Infrastructure
    TD Water Quality, Environmental Technology
    TJ-TK Energy, Mechanical and Electrical Engineering
    TL Transportation, Aeronautics, Space Exploration
    TN Mining, Metallurgy
    TP Chemical Engineering, Biotechnology
    TR Photography, Cinematography, Art Photography
    TT Craft, CLothing, Fashion, Furniture
    TX Food, Nutrition, Cookbooks
U Military Science  
V Naval Science  
Z Library and Information Science