Classification
400 - Language
000 - Computer science, information & general works
30
600 - Technology
30
700 - The arts; fine & decorative arts
24
330 - Economics
17
380 - Commerce, communications & transportation
14
140 - Specific philosophical schools
11
620 - Engineering & allied operations
11
900 - History & geography
11
333 - Economics of land & energy
10
370 - Education
9
363 - Other social problems & services
8
576 - Genetics & evolution
8
610 - Medicine & health
8
410 - Linguistics
7
100 - Philosophy & psychology
5
300 - Social sciences
5
320 - Political science
5
340 - Law
4
720 - Architecture
4
780 - Music
4
301 - Sociology & anthropology
3
580 - Plants (Botany)
3
581 - Specific topics in natural history
3
630 - Agriculture & related technologies
3
658 - General management
3
800 - Literature & rhetoric
3
414 - Phonology & phonetics
2
500 - Natural sciences & mathematics
2
530 - Physics
2
540 - Chemistry & allied sciences
2
791 - Public performances
2
160 - Logic
1
491 - East Indo-European & Celtic languages
1
551 - Geology, hydrology & meteorology
1
590 - Animals (Zoology)
1
615 - Pharmacology & therapeutics
1