Classification
330 - Economics
29
005 - Computer programming, programs & data
8
320 - Political science
8
333 - Economics of land & energy
8
620 - Engineering & allied operations
8
520 - Astronomy & allied sciences
6
610 - Medicine & health
6
658 - General management
6
304 - Factors affecting social behavior
5
577 - Ecology
5
006 - Special computer methods
4
338 - Production
4
500 - Natural sciences & mathematics
4
530 - Physics
4
572 - Biochemistry
4
616 - Diseases
4
004 - Data processing & computer science
3
150 - Psychology
3
327 - International relations
3
340 - Law
3
363 - Other social problems & services
3
370 - Education
3
510 - Mathematics
3
515 - Analysis
3
519 - Probabilities & applied mathematics
3
551 - Geology, hydrology & meteorology
3
580 - Plants (Botany)
3
621 - Applied physics
3
630 - Agriculture & related technologies
3
910 - Geography & travel
3
301 - Sociology & anthropology
2
306 - Culture & institutions
2
331 - Labor economics
2
501 - Philosophy & theory
2
539 - Modern physics
2
570 - Life sciences; biology
2
571 - Physiology & related subjects
2
590 - Animals (Zoology)
2
613 - Personal health & safety
2
615 - Pharmacology & therapeutics
2
660 - Chemical engineering
2
000 - Computer science, information & general works
1
020 - Library & information sciences
1
025 - Library operations
1
050 - General serial publications
1
100 - Philosophy & psychology
1
155 - Differential & developmental psychology
1
170 - Ethics
1
322 - Relation of state to organized groups
1
332 - Financial economics
1
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