Classification
621 - Applied physics
2,594
004 - Data processing & computer science
591
006 - Special computer methods
294
629 - Other branches of engineering
209
005 - Computer programming, programs & data
151
003 - Systems
97
620 - Engineering & allied operations
63
658 - General management
41
519 - Probabilities & applied mathematics
30
530 - Physics
20
534 - Sound & related vibrations
20
670 - Manufacturing
13
338 - Production
12
515 - Analysis
12
610 - Medicine & health
10
518 - Numerical analysis
7
624 - Civil engineering
6
330 - Economics
5
537 - Electricity & electronics
5
302 - Social interaction
4
381 - Commerce
4
511 - General principles of mathematics
4
535 - Light & infrared & ultraviolet phenomena
4
303 - Social processes
3
304 - Factors affecting social behavior
3
327 - International relations
3
333 - Economics of land & energy
3
526 - Mathematical geography
3
550 - Earth sciences
3
551 - Geology, hydrology & meteorology
3
650 - Management & auxiliary services
3
910 - Geography & travel
3
025 - Library operations
2
352 - General considerations of public administration
2
500 - Natural sciences & mathematics
2
509 - Historical, geographic & persons treatment
2
531 - Classical mechanics; solid mechanics
2
617 - Surgery & related medical specialties
2
627 - Hydraulic engineering
2
000 - Computer science, information & general works
1
307 - Communities
1
321 - Systems of governments & states
1
332 - Financial economics
1
340 - Law
1
343 - Military, tax, trade & industrial law
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
410 - Linguistics
1
418 - Standard usage & applied linguistics
1
more ...