Classification
006 - Special computer methods
19
530 - Physics
16
620 - Engineering & allied operations
12
519 - Probabilities & applied mathematics
10
000 - Computer science, information & general works
6
005 - Computer programming, programs & data
5
541 - Physical chemistry
5
330 - Economics
4
571 - Physiology & related subjects
4
610 - Medicine & health
4
500 - Natural sciences & mathematics
3
570 - Life sciences; biology
3
576 - Genetics & evolution
3
700 - The arts; fine & decorative arts
3
004 - Data processing & computer science
2
333 - Economics of land & energy
2
340 - Law
2
363 - Other social problems & services
2
511 - General principles of mathematics
2
516 - Geometry
2
520 - Astronomy & allied sciences
2
536 - Heat
2
540 - Chemistry & allied sciences
2
551 - Geology, hydrology & meteorology
2
572 - Biochemistry
2
577 - Ecology
2
600 - Technology
2
621 - Applied physics
2
658 - General management
2
100 - Philosophy & psychology
1
110 - Metaphysics
1
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
1
190 - Modern western philosophy
1
304 - Factors affecting social behavior
1
320 - Political science
1
350 - Public administration & military science
1
380 - Commerce, communications & transportation
1
510 - Mathematics
1
518 - Numerical analysis
1
547 - Organic chemistry
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1
780 - Music
1
820 - English & Old English literatures
1
900 - History & geography
1
910 - Geography & travel
1