The Leland Speed library collection is cataloged according to the Dewey Decimal Classification System. The reference collection is located on the main floor and includes subject dictionaries and encyclopedias, guides, handbooks, and generally quick information about all subjects. The general book collection is found on the library basement floor.
- 000 Computers, Information & General Reference
- 100 Philosophy & Psychology
- 200 Religion
- 300 Social Sciences
- 400 Language
- 500 Natural Sciences & Math
- 600 Technology (Applied Sciences)
- 700 Arts & Recreation
- 800 Literature
- 900 History & Geography
000 Computers, Information & General Reference
- 010 Bibliographies & catalogs
- 020 Library & information sciences
- 030 General encyclopedic works
- 040 [Unassigned]
- 050 General serials & their indexes
- 060 General organizations & museums
- 070 News media, journalism, publishing
- 080 General collections
- 090 Manuscripts & rare books
100 Philosophy & Psychology
- 110 Metaphysics
- 120 Epistemology, causation, humankind
- 130 Paranormal phenomena
- 140 Specific philosophical schools
- 150 Psychology
- 160 Logic
- 170 Ethics (Moral philosophy)
- 180 Ancient, medieval, Oriental philosophy
- 190 Modern Western philosophy
200 Religion
- 210 Natural theology
- 220 Bible
- 230 Christian Theology
- 240 Christian moral & devotional theology
- 250 Christian orders & local churches
- 260 Christian social theology
- 270 Christian church history
- 280 Christian denominations & sects
- 290 Other and comparative religions
300 Social Sciences
- 310 General statistics
- 320 Political science
- 330 Economics
- 340 Law
- 350 Public administration
- 360 Social services; associations
- 370 Education
- 380 Commerce, communications, transport
- 390 Customs, etiquette, folklore
400 Language
- 410 Linguistics
- 420 English & Old English
- 430 Germanic languages, i.e., German
- 440 Romance languages, i.e., French
- 450 Italian, Romanian, Rhaeto-Romanic languages
- 460 Spanish & Portuguese languages
- 470 Italic languages, i.e., Latin
- 480 Hellenic languages, i.e., Classical Greek
- 490 Other languages
500 Natural Sciences & Mathematics
- 510 Mathematics
- 520 Astronomy & allied sciences
- 530 Physics
- 540 Chemistry & allied sciences
- 550 Earth sciences
- 560 Paleontology, Paleozoology
- 570 Life Sciences
- 580 Botanical sciences
- 590 Zoological sciences
600 Technology (Applied Sciences)
- 610 Medical sciences
- 620 Engineering & allied sciences
- 630 Agriculture
- 650 Management & auxiliary services
- 660 Chemical engineering
- 640 Home economics & family living
- 670 Manufacturing
- 680 Manufacture for specific uses
- 690 Buildings
700 The Arts
- 710 Civic & landscape art
- 720 Architecture
- 730 Plastic arts
- 740 Drawing & decorative arts
- 750 Painting & paintings
- 760 Graphic arts
- 780 Music
- 770 Photography & photographs
- 790 Recreational & performing arts
800 Literature & Rhetoric
- 810 American literature in English
- 820 English and Old English literature
- 830 Literatures of Germanic languages
- 840 Literatures of Romance languages
- 850 Italian, Romanian, Rhaeto-Romanic
- 860 Spanish & Portuguese literatures
- 870 Italic literatures, i.e., Latin
- 880 Hellenic literatures, i.e., Classical Greek
- 890 Literatures of other languages
900 History & Geography
- 910 Geography & travel
- 920 Biography, genealogy, insignias
- 930 History of the ancient world
- 940 General history of Europe
- 950 General history of Asia & Far East
- 960 General history of Africa
- 970 General history of North America
- 980 General history of South America
- 990 General history of other areas
