Classification
330 - Economics
333 - Economics of land & energy
380 - Commerce, communications & transportation
610 - Medicine & health
700 - The arts; fine & decorative arts
600 - Technology
12
363 - Other social problems & services
11
140 - Specific philosophical schools
8
900 - History & geography
8
320 - Political science
7
551 - Geology, hydrology & meteorology
7
000 - Computer science, information & general works
6
370 - Education
6
576 - Genetics & evolution
5
304 - Factors affecting social behavior
4
620 - Engineering & allied operations
4
720 - Architecture
4
800 - Literature & rhetoric
4
658 - General management
3
400 - Language
2
410 - Linguistics
2
500 - Natural sciences & mathematics
2
580 - Plants (Botany)
2
200 - Religion
1
340 - Law
1
414 - Phonology & phonetics
1
540 - Chemistry & allied sciences
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1