Classification
333 - Economics of land & energy
500 - Natural sciences & mathematics
000 - Computer science, information & general works
46
700 - The arts; fine & decorative arts
37
600 - Technology
30
620 - Engineering & allied operations
18
330 - Economics
13
380 - Commerce, communications & transportation
12
576 - Genetics & evolution
12
900 - History & geography
12
530 - Physics
11
140 - Specific philosophical schools
7
363 - Other social problems & services
7
540 - Chemistry & allied sciences
7
400 - Language
6
610 - Medicine & health
6
340 - Law
5
800 - Literature & rhetoric
5
410 - Linguistics
4
414 - Phonology & phonetics
4
720 - Architecture
4
370 - Education
3
580 - Plants (Botany)
3
100 - Philosophy & psychology
2
120 - Epistemology, causation & humankind
2
170 - Ethics
2
551 - Geology, hydrology & meteorology
2
658 - General management
2
320 - Political science
1
361 - Social problems & social welfare in general
1
590 - Animals (Zoology)
1
630 - Agriculture & related technologies
1