Classification
005 - Computer programming, programs & data
154
658 - General management
114
000 - Computer science, information & general works
78
006 - Special computer methods
63
331 - Labor economics
40
330 - Economics
37
500 - Natural sciences & mathematics
37
004 - Data processing & computer science
33
338 - Production
23
374 - Adult education
23
381 - Commerce
19
745 - Decorative arts
18
620 - Engineering & allied operations
15
300 - Social sciences
14
384 - Communications; telecommunication
11
302 - Social interaction
10
510 - Mathematics
9
621 - Applied physics
9
001 - Knowledge
8
332 - Financial economics
8
380 - Commerce, communications & transportation
7
670 - Manufacturing
6
519 - Probabilities & applied mathematics
5
700 - The arts; fine & decorative arts
5
629 - Other branches of engineering
4
650 - Management & auxiliary services
4
770 - Photography, photographs & computer art
4
153 - Mental processes & intelligence
3
368 - Insurance
3
771 - Techniques, equipment & materials
3
794 - Indoor games of skill
3
152 - Perception, movement, emotions & drives
2
158 - Applied psychology
2
303 - Social processes
2
364 - Criminology
2
371 - Schools & their activities; special education
2
511 - General principles of mathematics
2
512 - Algebra
2
515 - Analysis
2
600 - Technology
2
741 - Drawing & drawings
2
025 - Library operations
1
150 - Psychology
1
170 - Ethics
1
174 - Occupational ethics
1
304 - Factors affecting social behavior
1
363 - Other social problems & services
1
657 - Accounting
1
720 - Architecture
1
746 - Textile arts
1
more ...