Classification
500 - Natural sciences & mathematics
620 - Engineering & allied operations
11
720 - Architecture
900 - History & geography
9
140 - Specific philosophical schools
6
540 - Chemistry & allied sciences
6
590 - Animals (Zoology)
6
100 - Philosophy & psychology
3
363 - Other social problems & services
3
600 - Technology
3
700 - The arts; fine & decorative arts
3
370 - Education
2
610 - Medicine & health
2
657 - Accounting
2
000 - Computer science, information & general works
1
120 - Epistemology, causation & humankind
1
333 - Economics of land & energy
1
380 - Commerce, communications & transportation
1
800 - Literature & rhetoric
1