Classification
000 - Computer science, information & general works
140 - Specific philosophical schools
330 - Economics
600 - Technology
700 - The arts; fine & decorative arts
25
333 - Economics of land & energy
23
380 - Commerce, communications & transportation
17
620 - Engineering & allied operations
16
363 - Other social problems & services
15
610 - Medicine & health
13
320 - Political science
10
630 - Agriculture & related technologies
9
658 - General management
9
576 - Genetics & evolution
8
900 - History & geography
8
551 - Geology, hydrology & meteorology
6
370 - Education
5
500 - Natural sciences & mathematics
5
720 - Architecture
4
340 - Law
3
361 - Social problems & social welfare in general
3
580 - Plants (Botany)
3
300 - Social sciences
2
400 - Language
2
410 - Linguistics
2
657 - Accounting
2
100 - Philosophy & psychology
1
160 - Logic
1
170 - Ethics
1
200 - Religion
1
540 - Chemistry & allied sciences
1
581 - Specific topics in natural history
1
770 - Photography, photographs & computer art
1
780 - Music
1
800 - Literature & rhetoric
1