Classification
000 - Computer science, information & general works
103
100 - Philosophy & psychology
4
140 - Specific philosophical schools
40
170 - Ethics
3
200 - Religion
10
203 - Public worship & other practices
1
221 - Old Testament (Tanakh)
1
297 - Islam, Babism & Bahai Faith
7
300 - Social sciences
8
301 - Sociology & anthropology
5
304 - Factors affecting social behavior
8
305 - Social groups
1
306 - Culture & institutions
4
307 - Communities
1
320 - Political science
39
327 - International relations
1
330 - Economics
62
333 - Economics of land & energy
65
338 - Production
4
340 - Law
5
343 - Military, tax, trade & industrial law
1
363 - Other social problems & services
72
370 - Education
15
380 - Commerce, communications & transportation
38
382 - International commerce
1
398 - Folklore
1
400 - Language
8
404 - Special topics
1
410 - Linguistics
3
414 - Phonology & phonetics
14
415 - Grammar
1
492 - Afro-Asiatic languages; Semitic languages
1
500 - Natural sciences & mathematics
7
520 - Astronomy & allied sciences
6
529 - Chronology
1
530 - Physics
2
540 - Chemistry & allied sciences
8
547 - Organic chemistry
1
550 - Earth sciences
1
551 - Geology, hydrology & meteorology
49
570 - Life sciences; biology
1
576 - Genetics & evolution
12
580 - Plants (Botany)
45
581 - Specific topics in natural history
23
590 - Animals (Zoology)
3
600 - Technology
32
610 - Medicine & health
85
612 - Human physiology
4
615 - Pharmacology & therapeutics
5
620 - Engineering & allied operations
28
more ...