Classification
300 - Social sciences
320 - Political science
600 - Technology
700 - The arts; fine & decorative arts
330 - Economics
12
620 - Engineering & allied operations
10
900 - History & geography
9
000 - Computer science, information & general works
8
630 - Agriculture & related technologies
8
100 - Philosophy & psychology
7
333 - Economics of land & energy
6
363 - Other social problems & services
6
140 - Specific philosophical schools
5
370 - Education
5
380 - Commerce, communications & transportation
4
780 - Music
4
170 - Ethics
3
301 - Sociology & anthropology
3
400 - Language
3
551 - Geology, hydrology & meteorology
3
720 - Architecture
3
200 - Religion
2
340 - Law
2
410 - Linguistics
2
530 - Physics
2
770 - Photography, photographs & computer art
2
120 - Epistemology, causation & humankind
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
610 - Medicine & health
1
650 - Management & auxiliary services
1
657 - Accounting
1
658 - General management
1