Classification
363 - Other social problems & services
700 - The arts; fine & decorative arts
333 - Economics of land & energy
20
600 - Technology
20
610 - Medicine & health
20
000 - Computer science, information & general works
18
330 - Economics
18
620 - Engineering & allied operations
12
900 - History & geography
12
320 - Political science
11
380 - Commerce, communications & transportation
11
140 - Specific philosophical schools
9
370 - Education
8
551 - Geology, hydrology & meteorology
8
100 - Philosophy & psychology
6
340 - Law
5
576 - Genetics & evolution
5
580 - Plants (Botany)
5
500 - Natural sciences & mathematics
4
581 - Specific topics in natural history
4
658 - General management
4
800 - Literature & rhetoric
4
200 - Religion
3
400 - Language
3
300 - Social sciences
2
304 - Factors affecting social behavior
2
410 - Linguistics
2
530 - Physics
2
612 - Human physiology
2
630 - Agriculture & related technologies
2
170 - Ethics
1
301 - Sociology & anthropology
1
414 - Phonology & phonetics
1
520 - Astronomy & allied sciences
1
540 - Chemistry & allied sciences
1
720 - Architecture
1
770 - Photography, photographs & computer art
1
780 - Music
1