Classification
330 - Economics
2,007
340 - Law
1,357
610 - Medicine & health
665
005 - Computer programming, programs & data
602
658 - General management
502
346 - Private law
443
006 - Special computer methods
358
004 - Data processing & computer science
323
621 - Applied physics
251
500 - Natural sciences & mathematics
172
620 - Engineering & allied operations
146
320 - Political science
142
331 - Labor economics
142
338 - Production
135
343 - Military, tax, trade & industrial law
124
344 - Labor, social, education & cultural law
123
304 - Factors affecting social behavior
93
333 - Economics of land & energy
89
363 - Other social problems & services
85
616 - Diseases
84
370 - Education
82
700 - The arts; fine & decorative arts
68
332 - Financial economics
67
745 - Decorative arts
62
629 - Other branches of engineering
61
300 - Social sciences
58
347 - Civil procedure & courts
57
374 - Adult education
57
342 - Constitutional & administrative law
56
380 - Commerce, communications & transportation
54
302 - Social interaction
53
000 - Computer science, information & general works
52
510 - Mathematics
52
384 - Communications; telecommunication
51
381 - Commerce
45
600 - Technology
45
519 - Probabilities & applied mathematics
42
617 - Surgery & related medical specialties
41
345 - Criminal law
37
650 - Management & auxiliary services
37
001 - Knowledge
36
306 - Culture & institutions
34
327 - International relations
34
530 - Physics
32
570 - Life sciences; biology
32
003 - Systems
30
670 - Manufacturing
29
515 - Analysis
28
371 - Schools & their activities; special education
27
153 - Mental processes & intelligence
26
more ...