Classification
600 - Technology
620 - Engineering & allied operations
720 - Architecture
900 - History & geography
700 - The arts; fine & decorative arts
59
333 - Economics of land & energy
37
000 - Computer science, information & general works
29
380 - Commerce, communications & transportation
28
330 - Economics
24
363 - Other social problems & services
24
140 - Specific philosophical schools
18
610 - Medicine & health
17
576 - Genetics & evolution
14
320 - Political science
11
580 - Plants (Botany)
9
340 - Law
8
800 - Literature & rhetoric
8
630 - Agriculture & related technologies
7
300 - Social sciences
6
370 - Education
6
658 - General management
6
100 - Philosophy & psychology
5
170 - Ethics
5
500 - Natural sciences & mathematics
5
400 - Language
4
530 - Physics
3
551 - Geology, hydrology & meteorology
3
120 - Epistemology, causation & humankind
1
160 - Logic
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
410 - Linguistics
1
540 - Chemistry & allied sciences
1
770 - Photography, photographs & computer art
1
780 - Music
1