Classification
006 - Special computer methods
395
004 - Data processing & computer science
383
003 - Systems
336
005 - Computer programming, programs & data
284
621 - Applied physics
115
620 - Engineering & allied operations
96
629 - Other branches of engineering
84
000 - Computer science, information & general works
70
518 - Numerical analysis
55
519 - Probabilities & applied mathematics
51
570 - Life sciences; biology
45
658 - General management
43
530 - Physics
39
670 - Manufacturing
35
610 - Medicine & health
32
333 - Economics of land & energy
28
600 - Technology
27
551 - Geology, hydrology & meteorology
22
700 - The arts; fine & decorative arts
22
624 - Civil engineering
20
910 - Geography & travel
19
500 - Natural sciences & mathematics
16
515 - Analysis
15
612 - Human physiology
15
330 - Economics
14
140 - Specific philosophical schools
12
304 - Factors affecting social behavior
11
363 - Other social problems & services
11
300 - Social sciences
10
660 - Chemical engineering
10
900 - History & geography
10
301 - Sociology & anthropology
9
380 - Commerce, communications & transportation
9
550 - Earth sciences
9
400 - Language
8
511 - General principles of mathematics
7
630 - Agriculture & related technologies
7
100 - Philosophy & psychology
6
540 - Chemistry & allied sciences
6
120 - Epistemology, causation & humankind
5
303 - Social processes
5
617 - Surgery & related medical specialties
5
025 - Library operations
4
170 - Ethics
4
531 - Classical mechanics; solid mechanics
4
571 - Physiology & related subjects
4
576 - Genetics & evolution
4
577 - Ecology
4
580 - Plants (Botany)
4
616 - Diseases
4
more ...