Classification
300 - Social sciences
333 - Economics of land & energy
320 - Political science
103
330 - Economics
82
363 - Other social problems & services
54
370 - Education
54
900 - History & geography
54
610 - Medicine & health
47
140 - Specific philosophical schools
43
100 - Philosophy & psychology
41
700 - The arts; fine & decorative arts
41
600 - Technology
39
301 - Sociology & anthropology
35
000 - Computer science, information & general works
33
620 - Engineering & allied operations
26
340 - Law
20
630 - Agriculture & related technologies
19
380 - Commerce, communications & transportation
18
551 - Geology, hydrology & meteorology
16
581 - Specific topics in natural history
16
170 - Ethics
15
200 - Religion
13
500 - Natural sciences & mathematics
13
576 - Genetics & evolution
13
720 - Architecture
12
304 - Factors affecting social behavior
9
800 - Literature & rhetoric
9
361 - Social problems & social welfare in general
7
400 - Language
7
540 - Chemistry & allied sciences
6
580 - Plants (Botany)
6
350 - Public administration & military science
4
360 - Social problems & services; associations
4
410 - Linguistics
4
364 - Criminology
3
414 - Phonology & phonetics
3
612 - Human physiology
3
657 - Accounting
3
658 - General management
3
120 - Epistemology, causation & humankind
2
336 - Public finance
2
530 - Physics
2
780 - Music
2
338 - Production
1
398 - Folklore
1
650 - Management & auxiliary services
1
770 - Photography, photographs & computer art
1