Classification
330 - Economics
605
320 - Political science
438
410 - Linguistics
422
900 - History & geography
419
800 - Literature & rhetoric
382
400 - Language
258
100 - Philosophy & psychology
230
340 - Law
193
700 - The arts; fine & decorative arts
176
300 - Social sciences
166
658 - General management
94
610 - Medicine & health
93
370 - Education
72
361 - Social problems & social welfare in general
67
301 - Sociology & anthropology
66
200 - Religion
65
380 - Commerce, communications & transportation
62
333 - Economics of land & energy
58
657 - Accounting
46
363 - Other social problems & services
39
780 - Music
39
346 - Private law
36
350 - Public administration & military science
36
000 - Computer science, information & general works
34
140 - Specific philosophical schools
32
336 - Public finance
31
304 - Factors affecting social behavior
28
620 - Engineering & allied operations
27
616 - Diseases
24
600 - Technology
22
650 - Management & auxiliary services
21
820 - English & Old English literatures
21
500 - Natural sciences & mathematics
20
630 - Agriculture & related technologies
20
414 - Phonology & phonetics
17
004 - Data processing & computer science
16
576 - Genetics & evolution
15
306 - Culture & institutions
14
530 - Physics
14
520 - Astronomy & allied sciences
11
523 - Specific celestial bodies & phenomena
11
720 - Architecture
11
005 - Computer programming, programs & data
9
006 - Special computer methods
9
170 - Ethics
9
615 - Pharmacology & therapeutics
9
617 - Surgery & related medical specialties
9
360 - Social problems & services; associations
8
629 - Other branches of engineering
8
621 - Applied physics
7
more ...