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