Classification
580 - Plants (Botany)
330 - Economics
27
333 - Economics of land & energy
27
600 - Technology
23
000 - Computer science, information & general works
20
610 - Medicine & health
18
363 - Other social problems & services
17
658 - General management
17
700 - The arts; fine & decorative arts
15
620 - Engineering & allied operations
13
630 - Agriculture & related technologies
13
380 - Commerce, communications & transportation
8
900 - History & geography
6
140 - Specific philosophical schools
5
551 - Geology, hydrology & meteorology
5
320 - Political science
4
340 - Law
4
370 - Education
3
576 - Genetics & evolution
3
581 - Specific topics in natural history
3
414 - Phonology & phonetics
2
530 - Physics
2
720 - Architecture
2
100 - Philosophy & psychology
1
170 - Ethics
1
297 - Islam, Babism & Bahai Faith
1
336 - Public finance
1
400 - Language
1
500 - Natural sciences & mathematics
1
520 - Astronomy & allied sciences
1
540 - Chemistry & allied sciences
1