Classification
414 - Phonology & phonetics
700 - The arts; fine & decorative arts
36
600 - Technology
27
620 - Engineering & allied operations
27
000 - Computer science, information & general works
25
333 - Economics of land & energy
22
900 - History & geography
19
610 - Medicine & health
16
363 - Other social problems & services
15
580 - Plants (Botany)
13
576 - Genetics & evolution
12
140 - Specific philosophical schools
9
380 - Commerce, communications & transportation
8
500 - Natural sciences & mathematics
7
551 - Geology, hydrology & meteorology
7
540 - Chemistry & allied sciences
6
304 - Factors affecting social behavior
4
330 - Economics
4
581 - Specific topics in natural history
4
612 - Human physiology
4
720 - Architecture
4
300 - Social sciences
3
320 - Political science
3
340 - Law
3
370 - Education
3
400 - Language
3
530 - Physics
3
410 - Linguistics
2
630 - Agriculture & related technologies
2
658 - General management
2
100 - Philosophy & psychology
1
170 - Ethics
1
301 - Sociology & anthropology
1
770 - Photography, photographs & computer art
1
800 - Literature & rhetoric
1