Classification
330 - Economics
380 - Commerce, communications & transportation
600 - Technology
700 - The arts; fine & decorative arts
333 - Economics of land & energy
51
900 - History & geography
48
620 - Engineering & allied operations
45
363 - Other social problems & services
30
000 - Computer science, information & general works
28
140 - Specific philosophical schools
20
320 - Political science
19
610 - Medicine & health
16
370 - Education
15
551 - Geology, hydrology & meteorology
11
658 - General management
10
720 - Architecture
10
576 - Genetics & evolution
9
630 - Agriculture & related technologies
8
400 - Language
7
800 - Literature & rhetoric
7
304 - Factors affecting social behavior
6
500 - Natural sciences & mathematics
6
300 - Social sciences
5
580 - Plants (Botany)
5
340 - Law
4
780 - Music
4
100 - Philosophy & psychology
3
581 - Specific topics in natural history
3
657 - Accounting
3
200 - Religion
2
410 - Linguistics
2
414 - Phonology & phonetics
2
530 - Physics
2
540 - Chemistry & allied sciences
2
160 - Logic
1
301 - Sociology & anthropology
1
336 - Public finance
1
650 - Management & auxiliary services
1
770 - Photography, photographs & computer art
1