Classification
005 - Computer programming, programs & data
63
658 - General management
27
006 - Special computer methods
23
330 - Economics
18
300 - Social sciences
15
004 - Data processing & computer science
13
331 - Labor economics
11
302 - Social interaction
10
500 - Natural sciences & mathematics
10
616 - Diseases
10
158 - Applied psychology
7
620 - Engineering & allied operations
7
128 - Humankind
6
153 - Mental processes & intelligence
6
338 - Production
6
370 - Education
6
100 - Philosophy & psychology
5
304 - Factors affecting social behavior
5
126 - The self
4
150 - Psychology
4
332 - Financial economics
4
380 - Commerce, communications & transportation
4
384 - Communications; telecommunication
4
400 - Language
4
410 - Linguistics
4
612 - Human physiology
4
629 - Other branches of engineering
4
650 - Management & auxiliary services
4
670 - Manufacturing
4
820 - English & Old English literatures
4
900 - History & geography
4
155 - Differential & developmental psychology
3
301 - Sociology & anthropology
3
320 - Political science
3
333 - Economics of land & energy
3
621 - Applied physics
3
003 - Systems
2
121 - Epistemology
2
305 - Social groups
2
418 - Standard usage & applied linguistics
2
510 - Mathematics
2
511 - General principles of mathematics
2
700 - The arts; fine & decorative arts
2
745 - Decorative arts
2
800 - Literature & rhetoric
2
001 - Knowledge
1
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
1
152 - Perception, movement, emotions & drives
1
160 - Logic
1
more ...