Classification
330 - Economics
333 - Economics of land & energy
620 - Engineering & allied operations
600 - Technology
224
900 - History & geography
146
700 - The arts; fine & decorative arts
125
363 - Other social problems & services
109
000 - Computer science, information & general works
70
380 - Commerce, communications & transportation
46
630 - Agriculture & related technologies
45
320 - Political science
39
580 - Plants (Botany)
39
610 - Medicine & health
37
140 - Specific philosophical schools
29
370 - Education
29
551 - Geology, hydrology & meteorology
28
500 - Natural sciences & mathematics
23
581 - Specific topics in natural history
20
720 - Architecture
20
658 - General management
17
576 - Genetics & evolution
16
300 - Social sciences
12
540 - Chemistry & allied sciences
12
340 - Law
9
800 - Literature & rhetoric
8
100 - Philosophy & psychology
6
304 - Factors affecting social behavior
6
170 - Ethics
5
400 - Language
5
414 - Phonology & phonetics
5
530 - Physics
4
657 - Accounting
4
200 - Religion
3
301 - Sociology & anthropology
3
297 - Islam, Babism & Bahai Faith
2
350 - Public administration & military science
2
361 - Social problems & social welfare in general
2
510 - Mathematics
2
120 - Epistemology, causation & humankind
1
160 - Logic
1
331 - Labor economics
1
332 - Financial economics
1
336 - Public finance
1
550 - Earth sciences
1
745 - Decorative arts
1
780 - Music
1
791 - Public performances
1