Classification
600 - Technology
137
333 - Economics of land & energy
125
620 - Engineering & allied operations
105
700 - The arts; fine & decorative arts
103
900 - History & geography
92
330 - Economics
52
380 - Commerce, communications & transportation
52
000 - Computer science, information & general works
44
363 - Other social problems & services
27
720 - Architecture
17
500 - Natural sciences & mathematics
15
530 - Physics
14
580 - Plants (Botany)
13
576 - Genetics & evolution
11
610 - Medicine & health
11
658 - General management
10
629 - Other branches of engineering
9
140 - Specific philosophical schools
7
551 - Geology, hydrology & meteorology
7
320 - Political science
6
370 - Education
4
540 - Chemistry & allied sciences
3
800 - Literature & rhetoric
3
338 - Production
2
340 - Law
2
400 - Language
2
630 - Agriculture & related technologies
2
100 - Philosophy & psychology
1
170 - Ethics
1
200 - Religion
1
361 - Social problems & social welfare in general
1
414 - Phonology & phonetics
1
621 - Applied physics
1
650 - Management & auxiliary services
1
745 - Decorative arts
1
780 - Music
1