Classification
330 - Economics
55
320 - Political science
25
790 - Recreational & performing arts
25
340 - Law
22
620 - Engineering & allied operations
20
658 - General management
19
005 - Computer programming, programs & data
17
630 - Agriculture & related technologies
17
006 - Special computer methods
13
820 - English & Old English literatures
12
004 - Data processing & computer science
10
300 - Social sciences
10
333 - Economics of land & energy
10
304 - Factors affecting social behavior
9
338 - Production
9
900 - History & geography
9
600 - Technology
8
500 - Natural sciences & mathematics
7
302 - Social interaction
6
331 - Labor economics
6
363 - Other social problems & services
6
610 - Medicine & health
6
700 - The arts; fine & decorative arts
6
720 - Architecture
6
000 - Computer science, information & general works
5
301 - Sociology & anthropology
5
380 - Commerce, communications & transportation
5
140 - Specific philosophical schools
4
332 - Financial economics
4
350 - Public administration & military science
4
381 - Commerce
4
551 - Geology, hydrology & meteorology
4
577 - Ecology
4
280 - Christian denominations & sects
3
306 - Culture & institutions
3
325 - International migration & colonization
3
362 - Social welfare problems & services
3
370 - Education
3
384 - Communications; telecommunication
3
410 - Linguistics
3
570 - Life sciences; biology
3
571 - Physiology & related subjects
3
621 - Applied physics
3
629 - Other branches of engineering
3
636 - Animal husbandry
3
745 - Decorative arts
3
800 - Literature & rhetoric
3
001 - Knowledge
2
155 - Differential & developmental psychology
2
158 - Applied psychology
2
more ...