Classification
003 - Systems
360
500 - Natural sciences & mathematics
305
620 - Engineering & allied operations
293
519 - Probabilities & applied mathematics
270
330 - Economics
247
332 - Financial economics
174
658 - General management
170
621 - Applied physics
146
515 - Analysis
128
006 - Special computer methods
115
700 - The arts; fine & decorative arts
107
600 - Technology
97
000 - Computer science, information & general works
95
510 - Mathematics
94
333 - Economics of land & energy
93
530 - Physics
72
570 - Life sciences; biology
59
629 - Other branches of engineering
59
610 - Medicine & health
58
900 - History & geography
58
551 - Geology, hydrology & meteorology
54
576 - Genetics & evolution
48
670 - Manufacturing
47
363 - Other social problems & services
46
004 - Data processing & computer science
44
338 - Production
37
518 - Numerical analysis
37
005 - Computer programming, programs & data
35
612 - Human physiology
32
380 - Commerce, communications & transportation
31
368 - Insurance
30
511 - General principles of mathematics
30
300 - Social sciences
28
331 - Labor economics
22
660 - Chemical engineering
22
153 - Mental processes & intelligence
21
540 - Chemistry & allied sciences
21
512 - Algebra
19
140 - Specific philosophical schools
18
381 - Commerce
18
580 - Plants (Botany)
18
532 - Fluid mechanics; liquid mechanics
16
340 - Law
15
384 - Communications; telecommunication
15
531 - Classical mechanics; solid mechanics
15
577 - Ecology
14
320 - Political science
13
541 - Physical chemistry
13
516 - Geometry
12
745 - Decorative arts
12
more ...