Classification
363 - Other social problems & services
620 - Engineering & allied operations
658 - General management
600 - Technology
21
330 - Economics
20
700 - The arts; fine & decorative arts
14
333 - Economics of land & energy
13
900 - History & geography
12
000 - Computer science, information & general works
11
380 - Commerce, communications & transportation
10
500 - Natural sciences & mathematics
7
140 - Specific philosophical schools
5
580 - Plants (Botany)
5
610 - Medicine & health
5
576 - Genetics & evolution
4
320 - Political science
3
370 - Education
3
551 - Geology, hydrology & meteorology
3
630 - Agriculture & related technologies
3
800 - Literature & rhetoric
3
331 - Labor economics
2
720 - Architecture
2
160 - Logic
1
297 - Islam, Babism & Bahai Faith
1
338 - Production
1
410 - Linguistics
1
414 - Phonology & phonetics
1
540 - Chemistry & allied sciences
1
581 - Specific topics in natural history
1