Classification
330 - Economics
234
320 - Political science
201
340 - Law
58
700 - The arts; fine & decorative arts
49
620 - Engineering & allied operations
39
600 - Technology
37
333 - Economics of land & energy
31
900 - History & geography
26
000 - Computer science, information & general works
23
363 - Other social problems & services
21
610 - Medicine & health
18
658 - General management
18
580 - Plants (Botany)
15
380 - Commerce, communications & transportation
11
500 - Natural sciences & mathematics
10
140 - Specific philosophical schools
7
370 - Education
6
630 - Agriculture & related technologies
6
300 - Social sciences
5
576 - Genetics & evolution
5
200 - Religion
4
540 - Chemistry & allied sciences
4
628 - Sanitary & municipal engineering
4
800 - Literature & rhetoric
4
530 - Physics
3
660 - Chemical engineering
3
670 - Manufacturing
3
720 - Architecture
3
100 - Philosophy & psychology
2
160 - Logic
2
302 - Social interaction
2
304 - Factors affecting social behavior
2
520 - Astronomy & allied sciences
2
551 - Geology, hydrology & meteorology
2
581 - Specific topics in natural history
2
745 - Decorative arts
2
120 - Epistemology, causation & humankind
1
170 - Ethics
1
297 - Islam, Babism & Bahai Faith
1
331 - Labor economics
1
338 - Production
1
361 - Social problems & social welfare in general
1
381 - Commerce
1
400 - Language
1
414 - Phonology & phonetics
1
577 - Ecology
1
615 - Pharmacology & therapeutics
1
668 - Technology of other organic products
1
687 - Clothing & accessories
1
697 - Heating, ventilating & air-conditioning
1
more ...