Classification
370 - Education
22
551 - Geology, hydrology & meteorology
700 - The arts; fine & decorative arts
333 - Economics of land & energy
18
363 - Other social problems & services
15
610 - Medicine & health
12
000 - Computer science, information & general works
11
320 - Political science
11
600 - Technology
10
330 - Economics
9
380 - Commerce, communications & transportation
9
140 - Specific philosophical schools
8
900 - History & geography
6
720 - Architecture
5
581 - Specific topics in natural history
4
620 - Engineering & allied operations
4
630 - Agriculture & related technologies
4
170 - Ethics
3
530 - Physics
3
576 - Genetics & evolution
3
304 - Factors affecting social behavior
2
400 - Language
2
540 - Chemistry & allied sciences
2
658 - General management
2
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
200 - Religion
1
300 - Social sciences
1
340 - Law
1
360 - Social problems & services; associations
1
410 - Linguistics
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
550 - Earth sciences
1
580 - Plants (Botany)
1
770 - Photography, photographs & computer art
1