Classification
658 - General management
620 - Engineering & allied operations
1,049
500 - Natural sciences & mathematics
412
330 - Economics
356
005 - Computer programming, programs & data
319
331 - Labor economics
195
384 - Communications; telecommunication
145
000 - Computer science, information & general works
140
338 - Production
125
745 - Decorative arts
100
381 - Commerce
95
300 - Social sciences
77
004 - Data processing & computer science
76
600 - Technology
72
650 - Management & auxiliary services
69
332 - Financial economics
66
670 - Manufacturing
64
302 - Social interaction
63
621 - Applied physics
47
900 - History & geography
41
374 - Adult education
38
700 - The arts; fine & decorative arts
38
363 - Other social problems & services
30
333 - Economics of land & energy
28
380 - Commerce, communications & transportation
28
006 - Special computer methods
24
153 - Mental processes & intelligence
21
510 - Mathematics
18
610 - Medicine & health
18
580 - Plants (Botany)
15
001 - Knowledge
14
025 - Library operations
14
140 - Specific philosophical schools
12
519 - Probabilities & applied mathematics
12
576 - Genetics & evolution
12
630 - Agriculture & related technologies
11
158 - Applied psychology
10
320 - Political science
10
368 - Insurance
9
370 - Education
8
629 - Other branches of engineering
8
659 - Advertising & public relations
8
628 - Sanitary & municipal engineering
7
303 - Social processes
6
720 - Architecture
6
800 - Literature & rhetoric
6
340 - Law
5
551 - Geology, hydrology & meteorology
5
304 - Factors affecting social behavior
4
410 - Linguistics
3
more ...