Classification
600 - Technology
720 - Architecture
900 - History & geography
13
620 - Engineering & allied operations
12
333 - Economics of land & energy
10
000 - Computer science, information & general works
8
330 - Economics
8
363 - Other social problems & services
8
700 - The arts; fine & decorative arts
8
380 - Commerce, communications & transportation
5
551 - Geology, hydrology & meteorology
4
580 - Plants (Botany)
4
610 - Medicine & health
4
320 - Political science
3
800 - Literature & rhetoric
3
140 - Specific philosophical schools
2
370 - Education
2
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
630 - Agriculture & related technologies
1
657 - Accounting
1
658 - General management
1