Classification
330 - Economics
94
320 - Political science
49
700 - The arts; fine & decorative arts
30
363 - Other social problems & services
25
000 - Computer science, information & general works
22
333 - Economics of land & energy
21
600 - Technology
20
630 - Agriculture & related technologies
20
610 - Medicine & health
18
300 - Social sciences
17
576 - Genetics & evolution
16
900 - History & geography
16
620 - Engineering & allied operations
15
340 - Law
14
380 - Commerce, communications & transportation
12
580 - Plants (Botany)
12
140 - Specific philosophical schools
9
382 - International commerce
9
791 - Public performances
8
338 - Production
7
658 - General management
7
500 - Natural sciences & mathematics
6
551 - Geology, hydrology & meteorology
6
384 - Communications; telecommunication
5
540 - Chemistry & allied sciences
4
070 - News media, journalism & publishing
3
301 - Sociology & anthropology
3
370 - Education
3
530 - Physics
3
100 - Philosophy & psychology
2
170 - Ethics
2
200 - Religion
2
304 - Factors affecting social behavior
2
381 - Commerce
2
581 - Specific topics in natural history
2
615 - Pharmacology & therapeutics
2
650 - Management & auxiliary services
2
777 - [Unassigned]
2
808 - Rhetoric & collections of literature
2
006 - Special computer methods
1
302 - Social interaction
1
343 - Military, tax, trade & industrial law
1
361 - Social problems & social welfare in general
1
400 - Language
1
410 - Linguistics
1
414 - Phonology & phonetics
1
541 - Physical chemistry
1
616 - Diseases
1
632 - Plant injuries, diseases & pests
1
657 - Accounting
1
more ...