Classification
300 - Social sciences
238
320 - Political science
118
600 - Technology
84
900 - History & geography
58
100 - Philosophy & psychology
46
340 - Law
36
330 - Economics
24
610 - Medicine & health
23
700 - The arts; fine & decorative arts
22
000 - Computer science, information & general works
19
200 - Religion
16
140 - Specific philosophical schools
12
301 - Sociology & anthropology
10
800 - Literature & rhetoric
8
363 - Other social problems & services
7
170 - Ethics
6
370 - Education
6
530 - Physics
5
581 - Specific topics in natural history
5
620 - Engineering & allied operations
5
658 - General management
5
400 - Language
4
500 - Natural sciences & mathematics
4
540 - Chemistry & allied sciences
4
333 - Economics of land & energy
3
380 - Commerce, communications & transportation
3
650 - Management & auxiliary services
3
361 - Social problems & social welfare in general
2
616 - Diseases
2
660 - Chemical engineering
2
720 - Architecture
2
780 - Music
2
791 - Public performances
2
809 - History, description & criticism
2
004 - Data processing & computer science
1
297 - Islam, Babism & Bahai Faith
1
302 - Social interaction
1
304 - Factors affecting social behavior
1
364 - Criminology
1
418 - Standard usage & applied linguistics
1
510 - Mathematics
1
548 - Crystallography
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
612 - Human physiology
1
623 - Military & nautical engineering
1
630 - Agriculture & related technologies
1
670 - Manufacturing
1
792 - Stage presentations
1
830 - Literatures of Germanic languages
1