Classification
621 - Applied physics
75
006 - Special computer methods
56
610 - Medicine & health
33
620 - Engineering & allied operations
30
600 - Technology
25
700 - The arts; fine & decorative arts
20
000 - Computer science, information & general works
17
570 - Life sciences; biology
16
515 - Analysis
14
900 - History & geography
13
571 - Physiology & related subjects
12
616 - Diseases
12
519 - Probabilities & applied mathematics
10
530 - Physics
10
500 - Natural sciences & mathematics
9
629 - Other branches of engineering
9
004 - Data processing & computer science
8
005 - Computer programming, programs & data
8
333 - Economics of land & energy
8
612 - Human physiology
8
140 - Specific philosophical schools
6
510 - Mathematics
6
534 - Sound & related vibrations
6
003 - Systems
5
617 - Surgery & related medical specialties
5
330 - Economics
4
380 - Commerce, communications & transportation
4
572 - Biochemistry
4
580 - Plants (Botany)
4
550 - Earth sciences
3
670 - Manufacturing
3
300 - Social sciences
2
384 - Communications; telecommunication
2
414 - Phonology & phonetics
2
531 - Classical mechanics; solid mechanics
2
535 - Light & infrared & ultraviolet phenomena
2
576 - Genetics & evolution
2
660 - Chemical engineering
2
780 - Music
2
001 - Knowledge
1
011 - Bibliographies
1
170 - Ethics
1
303 - Social processes
1
340 - Law
1
363 - Other social problems & services
1
370 - Education
1
400 - Language
1
511 - General principles of mathematics
1
518 - Numerical analysis
1
543 - Analytical chemistry
1
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