Classification
006 - Special computer methods
924
005 - Computer programming, programs & data
786
519 - Probabilities & applied mathematics
557
330 - Economics
370
658 - General management
326
004 - Data processing & computer science
275
000 - Computer science, information & general works
232
610 - Medicine & health
223
621 - Applied physics
220
500 - Natural sciences & mathematics
217
620 - Engineering & allied operations
197
570 - Life sciences; biology
177
600 - Technology
150
700 - The arts; fine & decorative arts
132
300 - Social sciences
124
616 - Diseases
109
333 - Economics of land & energy
106
001 - Knowledge
101
530 - Physics
97
510 - Mathematics
96
572 - Biochemistry
94
363 - Other social problems & services
77
003 - Systems
74
551 - Geology, hydrology & meteorology
74
571 - Physiology & related subjects
64
910 - Geography & travel
64
370 - Education
58
331 - Labor economics
57
670 - Manufacturing
53
338 - Production
50
550 - Earth sciences
50
580 - Plants (Botany)
49
900 - History & geography
46
380 - Commerce, communications & transportation
43
332 - Financial economics
41
612 - Human physiology
38
629 - Other branches of engineering
37
576 - Genetics & evolution
36
745 - Decorative arts
35
520 - Astronomy & allied sciences
33
304 - Factors affecting social behavior
32
320 - Political science
31
543 - Analytical chemistry
30
615 - Pharmacology & therapeutics
30
140 - Specific philosophical schools
29
153 - Mental processes & intelligence
29
539 - Modern physics
28
025 - Library operations
27
301 - Sociology & anthropology
27
302 - Social interaction
27
more ...