Classification
005 - Computer programming, programs & data
477
006 - Special computer methods
394
658 - General management
297
000 - Computer science, information & general works
241
330 - Economics
205
500 - Natural sciences & mathematics
138
620 - Engineering & allied operations
117
004 - Data processing & computer science
112
700 - The arts; fine & decorative arts
103
621 - Applied physics
101
600 - Technology
98
519 - Probabilities & applied mathematics
73
300 - Social sciences
71
333 - Economics of land & energy
64
610 - Medicine & health
57
338 - Production
50
001 - Knowledge
49
380 - Commerce, communications & transportation
44
900 - History & geography
39
331 - Labor economics
36
320 - Political science
33
140 - Specific philosophical schools
32
381 - Commerce
30
153 - Mental processes & intelligence
29
363 - Other social problems & services
28
670 - Manufacturing
26
302 - Social interaction
25
745 - Decorative arts
23
384 - Communications; telecommunication
18
530 - Physics
18
370 - Education
17
576 - Genetics & evolution
17
551 - Geology, hydrology & meteorology
15
570 - Life sciences; biology
15
720 - Architecture
15
003 - Systems
14
304 - Factors affecting social behavior
14
580 - Plants (Botany)
14
910 - Geography & travel
14
170 - Ethics
13
400 - Language
13
510 - Mathematics
13
629 - Other branches of engineering
13
630 - Agriculture & related technologies
13
100 - Philosophy & psychology
12
340 - Law
12
301 - Sociology & anthropology
11
303 - Social processes
11
332 - Financial economics
11
657 - Accounting
10
more ...