Classification
620 - Engineering & allied operations
20
530 - Physics
16
515 - Analysis
15
004 - Data processing & computer science
12
512 - Algebra
12
510 - Mathematics
10
511 - General principles of mathematics
10
531 - Classical mechanics; solid mechanics
9
330 - Economics
8
541 - Physical chemistry
8
005 - Computer programming, programs & data
7
006 - Special computer methods
7
300 - Social sciences
7
301 - Sociology & anthropology
7
500 - Natural sciences & mathematics
7
690 - Buildings
7
519 - Probabilities & applied mathematics
6
003 - Systems
5
302 - Social interaction
5
621 - Applied physics
5
624 - Civil engineering
5
658 - General management
5
670 - Manufacturing
5
514 - Topology
4
520 - Astronomy & allied sciences
4
539 - Modern physics
4
516 - Geometry
3
518 - Numerical analysis
3
001 - Knowledge
2
160 - Logic
2
331 - Labor economics
2
333 - Economics of land & energy
2
338 - Production
2
380 - Commerce, communications & transportation
2
501 - Philosophy & theory
2
540 - Chemistry & allied sciences
2
570 - Life sciences; biology
2
700 - The arts; fine & decorative arts
2
800 - Literature & rhetoric
2
000 - Computer science, information & general works
1
050 - General serial publications
1
121 - Epistemology
1
155 - Differential & developmental psychology
1
305 - Social groups
1
306 - Culture & institutions
1
332 - Financial economics
1
336 - Public finance
1
341 - Law of nations
1
362 - Social welfare problems & services
1
363 - Other social problems & services
1
more ...