Classification
658 - General management
27
005 - Computer programming, programs & data
11
510 - Mathematics
10
618 - Gynecology, obstetrics, pediatrics & geriatrics
8
546 - Inorganic chemistry
7
320 - Political science
6
616 - Diseases
6
150 - Psychology
5
610 - Medicine & health
5
650 - Management & auxiliary services
5
338 - Production
4
520 - Astronomy & allied sciences
4
617 - Surgery & related medical specialties
4
620 - Engineering & allied operations
4
158 - Applied psychology
3
306 - Culture & institutions
3
330 - Economics
3
332 - Financial economics
3
370 - Education
3
500 - Natural sciences & mathematics
3
512 - Algebra
3
515 - Analysis
3
519 - Probabilities & applied mathematics
3
530 - Physics
3
571 - Physiology & related subjects
3
611 - Human anatomy, cytology & histology
3
657 - Accounting
3
910 - Geography & travel
3
004 - Data processing & computer science
2
025 - Library operations
2
300 - Social sciences
2
301 - Sociology & anthropology
2
304 - Factors affecting social behavior
2
336 - Public finance
2
541 - Physical chemistry
2
615 - Pharmacology & therapeutics
2
297 - Islam, Babism & Bahai Faith
1
302 - Social interaction
1
305 - Social groups
1
340 - Law
1
344 - Labor, social, education & cultural law
1
345 - Criminal law
1
346 - Private law
1
347 - Civil procedure & courts
1
362 - Social welfare problems & services
1
371 - Schools & their activities; special education
1
509 - Historical, geographic & persons treatment
1
511 - General principles of mathematics
1
536 - Heat
1
549 - Mineralogy
1
more ...