Classification
620 - Engineering & allied operations
600 - Technology
21
900 - History & geography
18
510 - Mathematics
17
500 - Natural sciences & mathematics
15
700 - The arts; fine & decorative arts
15
000 - Computer science, information & general works
12
530 - Physics
8
333 - Economics of land & energy
6
621 - Applied physics
6
363 - Other social problems & services
5
340 - Law
4
380 - Commerce, communications & transportation
4
610 - Medicine & health
3
005 - Computer programming, programs & data
2
300 - Social sciences
2
332 - Financial economics
2
370 - Education
2
400 - Language
2
551 - Geology, hydrology & meteorology
2
576 - Genetics & evolution
2
629 - Other branches of engineering
2
800 - Literature & rhetoric
2
140 - Specific philosophical schools
1
304 - Factors affecting social behavior
1
320 - Political science
1
515 - Analysis
1
518 - Numerical analysis
1
531 - Classical mechanics; solid mechanics
1
532 - Fluid mechanics; liquid mechanics
1
550 - Earth sciences
1
570 - Life sciences; biology
1
657 - Accounting
1
660 - Chemical engineering
1
780 - Music
1