Classification
330 - Economics
101
005 - Computer programming, programs & data
78
006 - Special computer methods
22
004 - Data processing & computer science
18
658 - General management
18
320 - Political science
17
331 - Labor economics
17
620 - Engineering & allied operations
15
000 - Computer science, information & general works
13
340 - Law
13
304 - Factors affecting social behavior
11
333 - Economics of land & energy
11
338 - Production
10
500 - Natural sciences & mathematics
9
621 - Applied physics
9
745 - Decorative arts
9
332 - Financial economics
8
610 - Medicine & health
8
341 - Law of nations
6
370 - Education
6
384 - Communications; telecommunication
6
519 - Probabilities & applied mathematics
6
342 - Constitutional & administrative law
5
700 - The arts; fine & decorative arts
5
900 - History & geography
5
327 - International relations
4
300 - Social sciences
3
302 - Social interaction
3
374 - Adult education
3
780 - Music
3
140 - Specific philosophical schools
2
142 - Critical philosophy
2
305 - Social groups
2
306 - Culture & institutions
2
323 - Civil & political rights
2
337 - International economics
2
380 - Commerce, communications & transportation
2
400 - Language
2
418 - Standard usage & applied linguistics
2
577 - Ecology
2
616 - Diseases
2
629 - Other branches of engineering
2
670 - Manufacturing
2
940 - History of Europe
2
003 - Systems
1
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
153 - Mental processes & intelligence
1
155 - Differential & developmental psychology
1
189 - Medieval western philosophy
1
more ...