Classification
600 - Technology
61
620 - Engineering & allied operations
48
700 - The arts; fine & decorative arts
47
900 - History & geography
41
333 - Economics of land & energy
40
000 - Computer science, information & general works
33
500 - Natural sciences & mathematics
23
330 - Economics
21
380 - Commerce, communications & transportation
21
363 - Other social problems & services
18
576 - Genetics & evolution
18
140 - Specific philosophical schools
16
580 - Plants (Botany)
15
610 - Medicine & health
14
340 - Law
9
530 - Physics
7
720 - Architecture
7
551 - Geology, hydrology & meteorology
6
320 - Political science
5
400 - Language
4
414 - Phonology & phonetics
4
540 - Chemistry & allied sciences
4
658 - General management
4
100 - Philosophy & psychology
2
541 - Physical chemistry
2
630 - Agriculture & related technologies
2
170 - Ethics
1
370 - Education
1
542 - Techniques, equipment & materials
1
574 - [Unassigned]
1
581 - Specific topics in natural history
1
650 - Management & auxiliary services
1
660 - Chemical engineering
1
780 - Music
1
800 - Literature & rhetoric
1