Classification
510 - Mathematics
1,504
519 - Probabilities & applied mathematics
118
512 - Algebra
89
516 - Geometry
83
515 - Analysis
80
511 - General principles of mathematics
69
620 - Engineering & allied operations
31
530 - Physics
30
500 - Natural sciences & mathematics
21
658 - General management
21
004 - Data processing & computer science
20
330 - Economics
20
514 - Topology
17
621 - Applied physics
17
005 - Computer programming, programs & data
13
370 - Education
12
003 - Systems
8
006 - Special computer methods
7
332 - Financial economics
6
650 - Management & auxiliary services
6
518 - Numerical analysis
5
540 - Chemistry & allied sciences
5
570 - Life sciences; biology
5
610 - Medicine & health
5
520 - Astronomy & allied sciences
4
531 - Classical mechanics; solid mechanics
4
001 - Knowledge
3
331 - Labor economics
3
374 - Adult education
3
384 - Communications; telecommunication
3
517 - [Unassigned]
3
541 - Physical chemistry
3
000 - Computer science, information & general works
2
300 - Social sciences
2
333 - Economics of land & energy
2
371 - Schools & their activities; special education
2
378 - Higher education
2
507 - Education, research & related topics
2
550 - Earth sciences
2
900 - History & geography
2
910 - Geography & travel
2
100 - Philosophy & psychology
1
111 - Ontology
1
145 - Sensationalism
1
150 - Psychology
1
170 - Ethics
1
200 - Religion
1
245 - [Unassigned]
1
302 - Social interaction
1
304 - Factors affecting social behavior
1
more ...