Classification
658 - General management
379
330 - Economics
175
620 - Engineering & allied operations
133
500 - Natural sciences & mathematics
69
300 - Social sciences
68
363 - Other social problems & services
68
005 - Computer programming, programs & data
65
000 - Computer science, information & general works
62
670 - Manufacturing
54
338 - Production
52
610 - Medicine & health
43
333 - Economics of land & energy
40
551 - Geology, hydrology & meteorology
40
621 - Applied physics
40
700 - The arts; fine & decorative arts
39
302 - Social interaction
38
331 - Labor economics
38
600 - Technology
38
570 - Life sciences; biology
37
004 - Data processing & computer science
26
519 - Probabilities & applied mathematics
26
320 - Political science
25
362 - Social welfare problems & services
25
580 - Plants (Botany)
21
900 - History & geography
21
664 - Food technology
19
380 - Commerce, communications & transportation
17
384 - Communications; telecommunication
17
628 - Sanitary & municipal engineering
17
745 - Decorative arts
16
140 - Specific philosophical schools
15
629 - Other branches of engineering
14
577 - Ecology
13
660 - Chemical engineering
13
006 - Special computer methods
12
510 - Mathematics
12
540 - Chemistry & allied sciences
12
615 - Pharmacology & therapeutics
11
153 - Mental processes & intelligence
10
690 - Buildings
10
381 - Commerce
8
624 - Civil engineering
8
630 - Agriculture & related technologies
8
641 - Food & drink
8
340 - Law
7
576 - Genetics & evolution
7
616 - Diseases
7
370 - Education
6
550 - Earth sciences
6
720 - Architecture
6
more ...