Classification
512 - Algebra
916
510 - Mathematics
184
515 - Analysis
153
516 - Geometry
138
511 - General principles of mathematics
130
005 - Computer programming, programs & data
98
004 - Data processing & computer science
48
519 - Probabilities & applied mathematics
47
518 - Numerical analysis
39
530 - Physics
28
003 - Systems
23
514 - Topology
21
621 - Applied physics
18
500 - Natural sciences & mathematics
17
006 - Special computer methods
10
620 - Engineering & allied operations
10
330 - Economics
9
000 - Computer science, information & general works
6
001 - Knowledge
6
300 - Social sciences
6
501 - Philosophy & theory
5
331 - Labor economics
4
900 - History & geography
4
338 - Production
3
576 - Genetics & evolution
3
600 - Technology
3
658 - General management
3
700 - The arts; fine & decorative arts
3
160 - Logic
2
332 - Financial economics
2
333 - Economics of land & energy
2
541 - Physical chemistry
2
100 - Philosophy & psychology
1
189 - Medieval western philosophy
1
340 - Law
1
342 - Constitutional & administrative law
1
370 - Education
1
380 - Commerce, communications & transportation
1
384 - Communications; telecommunication
1
509 - Historical, geographic & persons treatment
1
520 - Astronomy & allied sciences
1
531 - Classical mechanics; solid mechanics
1
532 - Fluid mechanics; liquid mechanics
1
534 - Sound & related vibrations
1
540 - Chemistry & allied sciences
1
546 - Inorganic chemistry
1
548 - Crystallography
1
572 - Biochemistry
1
577 - Ecology
1
610 - Medicine & health
1
more ...