Classification
658 - General management
40
620 - Engineering & allied operations
28
670 - Manufacturing
23
621 - Applied physics
22
330 - Economics
14
363 - Other social problems & services
13
660 - Chemical engineering
9
331 - Labor economics
8
333 - Economics of land & energy
8
624 - Civil engineering
8
519 - Probabilities & applied mathematics
7
629 - Other branches of engineering
7
641 - Food & drink
7
664 - Food technology
7
500 - Natural sciences & mathematics
6
628 - Sanitary & municipal engineering
6
690 - Buildings
6
338 - Production
5
340 - Law
4
005 - Computer programming, programs & data
3
300 - Social sciences
3
344 - Labor, social, education & cultural law
3
368 - Insurance
3
370 - Education
3
530 - Physics
3
551 - Geology, hydrology & meteorology
3
610 - Medicine & health
3
003 - Systems
2
004 - Data processing & computer science
2
158 - Applied psychology
2
320 - Political science
2
362 - Social welfare problems & services
2
553 - Economic geology
2
600 - Technology
2
613 - Personal health & safety
2
616 - Diseases
2
627 - Hydraulic engineering
2
900 - History & geography
2
000 - Computer science, information & general works
1
006 - Special computer methods
1
302 - Social interaction
1
342 - Constitutional & administrative law
1
345 - Criminal law
1
384 - Communications; telecommunication
1
539 - Modern physics
1
542 - Techniques, equipment & materials
1
581 - Specific topics in natural history
1
614 - Incidence & prevention of disease
1
691 - Building materials
1
700 - The arts; fine & decorative arts
1
more ...