Classification
304 - Factors affecting social behavior
240
330 - Economics
61
331 - Labor economics
19
338 - Production
18
658 - General management
16
306 - Culture & institutions
12
300 - Social sciences
11
301 - Sociology & anthropology
11
320 - Political science
11
571 - Physiology & related subjects
10
339 - Macroeconomics & related topics
9
305 - Social groups
8
910 - Geography & travel
6
577 - Ecology
5
613 - Personal health & safety
5
614 - Incidence & prevention of disease
5
340 - Law
4
005 - Computer programming, programs & data
3
333 - Economics of land & energy
3
610 - Medicine & health
3
150 - Psychology
2
155 - Differential & developmental psychology
2
302 - Social interaction
2
303 - Social processes
2
337 - International economics
2
343 - Military, tax, trade & industrial law
2
519 - Probabilities & applied mathematics
2
629 - Other branches of engineering
2
650 - Management & auxiliary services
2
930 - History of ancient world to ca. 499
2
004 - Data processing & computer science
1
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
1
170 - Ethics
1
307 - Communities
1
322 - Relation of state to organized groups
1
336 - Public finance
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
370 - Education
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
570 - Life sciences; biology
1
616 - Diseases
1
618 - Gynecology, obstetrics, pediatrics & geriatrics
1
620 - Engineering & allied operations
1
657 - Accounting
1
660 - Chemical engineering
1
700 - The arts; fine & decorative arts
1
more ...