Classification
620 - Engineering & allied operations
2,066
621 - Applied physics
369
531 - Classical mechanics; solid mechanics
294
629 - Other branches of engineering
218
006 - Special computer methods
202
624 - Civil engineering
135
003 - Systems
134
530 - Physics
131
690 - Buildings
111
515 - Analysis
99
670 - Manufacturing
70
519 - Probabilities & applied mathematics
66
610 - Medicine & health
57
691 - Building materials
51
518 - Numerical analysis
27
534 - Sound & related vibrations
26
535 - Light & infrared & ultraviolet phenomena
23
660 - Chemical engineering
18
510 - Mathematics
15
536 - Heat
15
627 - Hydraulic engineering
12
551 - Geology, hydrology & meteorology
9
516 - Geometry
7
667 - Cleaning, color & coating technologies
7
693 - Specific materials & purposes
7
537 - Electricity & electronics
6
658 - General management
6
004 - Data processing & computer science
5
550 - Earth sciences
5
500 - Natural sciences & mathematics
4
571 - Physiology & related subjects
4
628 - Sanitary & municipal engineering
4
005 - Computer programming, programs & data
3
303 - Social processes
3
320 - Political science
3
330 - Economics
3
511 - General principles of mathematics
3
512 - Algebra
3
520 - Astronomy & allied sciences
3
526 - Mathematical geography
3
532 - Fluid mechanics; liquid mechanics
3
533 - Gas mechanics
3
570 - Life sciences; biology
3
612 - Human physiology
3
062 - Organizations in British Isles; in England
2
370 - Education
2
509 - Historical, geographic & persons treatment
2
523 - Specific celestial bodies & phenomena
2
543 - Analytical chemistry
2
681 - Precision instruments & other devices
2
more ...