Classification
100 - Philosophy & psychology
330 - Economics
23
300 - Social sciences
17
333 - Economics of land & energy
15
700 - The arts; fine & decorative arts
12
000 - Computer science, information & general works
11
900 - History & geography
11
320 - Political science
10
370 - Education
10
600 - Technology
10
170 - Ethics
7
380 - Commerce, communications & transportation
7
400 - Language
7
500 - Natural sciences & mathematics
6
610 - Medicine & health
6
340 - Law
5
620 - Engineering & allied operations
5
780 - Music
5
140 - Specific philosophical schools
4
200 - Religion
3
301 - Sociology & anthropology
3
363 - Other social problems & services
3
410 - Linguistics
3
612 - Human physiology
3
658 - General management
3
361 - Social problems & social welfare in general
2
540 - Chemistry & allied sciences
2
800 - Literature & rhetoric
2
120 - Epistemology, causation & humankind
1
160 - Logic
1
414 - Phonology & phonetics
1
520 - Astronomy & allied sciences
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
630 - Agriculture & related technologies
1
657 - Accounting
1
770 - Photography, photographs & computer art
1