Classification
330 - Economics
700 - The arts; fine & decorative arts
333 - Economics of land & energy
102
363 - Other social problems & services
95
600 - Technology
73
000 - Computer science, information & general works
64
320 - Political science
63
900 - History & geography
54
620 - Engineering & allied operations
50
140 - Specific philosophical schools
41
380 - Commerce, communications & transportation
39
551 - Geology, hydrology & meteorology
36
610 - Medicine & health
33
658 - General management
23
630 - Agriculture & related technologies
21
370 - Education
17
300 - Social sciences
16
580 - Plants (Botany)
16
720 - Architecture
16
340 - Law
15
500 - Natural sciences & mathematics
13
301 - Sociology & anthropology
9
100 - Philosophy & psychology
8
200 - Religion
8
576 - Genetics & evolution
8
400 - Language
7
540 - Chemistry & allied sciences
7
800 - Literature & rhetoric
7
410 - Linguistics
6
581 - Specific topics in natural history
6
657 - Accounting
6
304 - Factors affecting social behavior
4
414 - Phonology & phonetics
4
170 - Ethics
3
360 - Social problems & services; associations
2
550 - Earth sciences
2
770 - Photography, photographs & computer art
2
780 - Music
2
120 - Epistemology, causation & humankind
1
160 - Logic
1
297 - Islam, Babism & Bahai Faith
1
350 - Public administration & military science
1
361 - Social problems & social welfare in general
1
530 - Physics
1
650 - Management & auxiliary services
1