Classification
621 - Applied physics
5,015
006 - Special computer methods
4,288
005 - Computer programming, programs & data
4,053
620 - Engineering & allied operations
2,918
004 - Data processing & computer science
2,231
629 - Other branches of engineering
1,989
003 - Systems
1,140
610 - Medicine & health
837
624 - Civil engineering
743
670 - Manufacturing
739
040 - [Unassigned]
619
519 - Probabilities & applied mathematics
580
658 - General management
484
660 - Chemical engineering
452
530 - Physics
439
333 - Economics of land & energy
317
515 - Analysis
295
518 - Numerical analysis
287
571 - Physiology & related subjects
285
551 - Geology, hydrology & meteorology
270
628 - Sanitary & municipal engineering
242
690 - Buildings
238
550 - Earth sciences
174
363 - Other social problems & services
164
531 - Classical mechanics; solid mechanics
154
062 - Organizations in British Isles; in England
140
520 - Astronomy & allied sciences
136
616 - Diseases
118
612 - Human physiology
116
304 - Factors affecting social behavior
105
500 - Natural sciences & mathematics
101
691 - Building materials
99
537 - Electricity & electronics
92
570 - Life sciences; biology
92
541 - Physical chemistry
90
579 - Microorganisms, fungi & algae
87
338 - Production
86
910 - Geography & travel
83
539 - Modern physics
77
332 - Financial economics
70
664 - Food technology
61
535 - Light & infrared & ultraviolet phenomena
60
534 - Sound & related vibrations
58
720 - Architecture
58
371 - Schools & their activities; special education
56
627 - Hydraulic engineering
53
330 - Economics
49
321 - Systems of governments & states
48
536 - Heat
45
543 - Analytical chemistry
45
more ...