Classification
515 - Analysis
859
512 - Algebra
663
004 - Data processing & computer science
653
514 - Topology
635
006 - Special computer methods
518
530 - Physics
480
516 - Geometry
470
621 - Applied physics
463
005 - Computer programming, programs & data
411
620 - Engineering & allied operations
391
510 - Mathematics
326
519 - Probabilities & applied mathematics
230
511 - General principles of mathematics
199
331 - Labor economics
180
003 - Systems
148
500 - Natural sciences & mathematics
135
000 - Computer science, information & general works
118
600 - Technology
111
658 - General management
109
700 - The arts; fine & decorative arts
107
629 - Other branches of engineering
106
330 - Economics
87
384 - Communications; telecommunication
79
333 - Economics of land & energy
78
900 - History & geography
64
518 - Numerical analysis
62
541 - Physical chemistry
60
572 - Biochemistry
60
001 - Knowledge
57
571 - Physiology & related subjects
57
300 - Social sciences
51
374 - Adult education
47
570 - Life sciences; biology
46
610 - Medicine & health
43
616 - Diseases
36
910 - Geography & travel
35
380 - Commerce, communications & transportation
34
670 - Manufacturing
33
539 - Modern physics
32
523 - Specific celestial bodies & phenomena
31
576 - Genetics & evolution
29
363 - Other social problems & services
28
520 - Astronomy & allied sciences
28
531 - Classical mechanics; solid mechanics
26
745 - Decorative arts
25
580 - Plants (Botany)
24
501 - Philosophy & theory
23
612 - Human physiology
23
660 - Chemical engineering
20
025 - Library operations
18
more ...