Classification
006 - Special computer methods
574
620 - Engineering & allied operations
394
621 - Applied physics
170
515 - Analysis
165
005 - Computer programming, programs & data
154
519 - Probabilities & applied mathematics
151
004 - Data processing & computer science
146
600 - Technology
139
000 - Computer science, information & general works
135
616 - Diseases
135
700 - The arts; fine & decorative arts
135
530 - Physics
122
571 - Physiology & related subjects
117
333 - Economics of land & energy
114
500 - Natural sciences & mathematics
109
577 - Ecology
98
330 - Economics
89
551 - Geology, hydrology & meteorology
88
900 - History & geography
87
580 - Plants (Botany)
84
572 - Biochemistry
82
610 - Medicine & health
76
518 - Numerical analysis
74
531 - Classical mechanics; solid mechanics
66
003 - Systems
64
363 - Other social problems & services
53
576 - Genetics & evolution
50
629 - Other branches of engineering
49
331 - Labor economics
45
510 - Mathematics
42
550 - Earth sciences
38
380 - Commerce, communications & transportation
37
658 - General management
36
520 - Astronomy & allied sciences
33
541 - Physical chemistry
33
745 - Decorative arts
33
001 - Knowledge
32
612 - Human physiology
32
770 - Photography, photographs & computer art
30
570 - Life sciences; biology
29
300 - Social sciences
27
581 - Specific topics in natural history
23
630 - Agriculture & related technologies
23
624 - Civil engineering
22
140 - Specific philosophical schools
20
516 - Geometry
20
153 - Mental processes & intelligence
19
660 - Chemical engineering
19
910 - Geography & travel
19
512 - Algebra
18
more ...