Classification
340 - Law
700 - The arts; fine & decorative arts
320 - Political science
259
330 - Economics
197
900 - History & geography
133
600 - Technology
85
333 - Economics of land & energy
78
000 - Computer science, information & general works
69
140 - Specific philosophical schools
60
363 - Other social problems & services
57
620 - Engineering & allied operations
56
380 - Commerce, communications & transportation
44
300 - Social sciences
40
100 - Philosophy & psychology
39
610 - Medicine & health
38
500 - Natural sciences & mathematics
33
370 - Education
29
170 - Ethics
28
576 - Genetics & evolution
27
200 - Religion
24
400 - Language
24
800 - Literature & rhetoric
24
530 - Physics
20
580 - Plants (Botany)
18
551 - Geology, hydrology & meteorology
16
304 - Factors affecting social behavior
15
410 - Linguistics
15
630 - Agriculture & related technologies
15
720 - Architecture
15
301 - Sociology & anthropology
11
658 - General management
11
581 - Specific topics in natural history
8
361 - Social problems & social welfare in general
7
414 - Phonology & phonetics
7
780 - Music
7
297 - Islam, Babism & Bahai Faith
6
540 - Chemistry & allied sciences
6
120 - Epistemology, causation & humankind
5
364 - Criminology
4
770 - Photography, photographs & computer art
4
350 - Public administration & military science
3
491 - East Indo-European & Celtic languages
3
791 - Public performances
3
360 - Social problems & services; associations
2
612 - Human physiology
2
160 - Logic
1
230 - Christianity & Christian theology
1
296 - Judaism
1
337 - International economics
1
342 - Constitutional & administrative law
1
more ...