Classification
500 - Natural sciences & mathematics
620 - Engineering & allied operations
17
658 - General management
14
004 - Data processing & computer science
9
330 - Economics
9
300 - Social sciences
7
302 - Social interaction
7
670 - Manufacturing
6
003 - Systems
5
005 - Computer programming, programs & data
5
338 - Production
5
331 - Labor economics
4
384 - Communications; telecommunication
4
520 - Astronomy & allied sciences
4
600 - Technology
4
530 - Physics
3
000 - Computer science, information & general works
2
006 - Special computer methods
2
629 - Other branches of engineering
2
153 - Mental processes & intelligence
1
332 - Financial economics
1
333 - Economics of land & energy
1
364 - Criminology
1
381 - Commerce
1
400 - Language
1
501 - Philosophy & theory
1
510 - Mathematics
1
526 - Mathematical geography
1
534 - Sound & related vibrations
1
570 - Life sciences; biology
1
571 - Physiology & related subjects
1
576 - Genetics & evolution
1
610 - Medicine & health
1
621 - Applied physics
1
660 - Chemical engineering
1
700 - The arts; fine & decorative arts
1
745 - Decorative arts
1
780 - Music
1
781 - General principles & musical forms
1
900 - History & geography
1