Classification
004 - Data processing & computer science
78
003 - Systems
71
006 - Special computer methods
51
629 - Other branches of engineering
34
620 - Engineering & allied operations
30
005 - Computer programming, programs & data
25
519 - Probabilities & applied mathematics
23
621 - Applied physics
16
333 - Economics of land & energy
10
670 - Manufacturing
10
551 - Geology, hydrology & meteorology
9
530 - Physics
8
610 - Medicine & health
8
550 - Earth sciences
7
000 - Computer science, information & general works
6
658 - General management
6
700 - The arts; fine & decorative arts
5
304 - Factors affecting social behavior
4
515 - Analysis
4
600 - Technology
4
900 - History & geography
4
338 - Production
3
518 - Numerical analysis
3
553 - Economic geology
3
140 - Specific philosophical schools
2
330 - Economics
2
501 - Philosophy & theory
2
526 - Mathematical geography
2
531 - Classical mechanics; solid mechanics
2
628 - Sanitary & municipal engineering
2
650 - Management & auxiliary services
2
025 - Library operations
1
110 - Metaphysics
1
301 - Sociology & anthropology
1
320 - Political science
1
363 - Other social problems & services
1
370 - Education
1
371 - Schools & their activities; special education
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
516 - Geometry
1
523 - Specific celestial bodies & phenomena
1
539 - Modern physics
1
540 - Chemistry & allied sciences
1
570 - Life sciences; biology
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1
617 - Surgery & related medical specialties
1
more ...