Classification
330 - Economics
1,790
610 - Medicine & health
716
658 - General management
432
333 - Economics of land & energy
369
616 - Diseases
331
620 - Engineering & allied operations
318
600 - Technology
251
380 - Commerce, communications & transportation
243
304 - Factors affecting social behavior
230
700 - The arts; fine & decorative arts
207
363 - Other social problems & services
206
000 - Computer science, information & general works
199
370 - Education
195
320 - Political science
192
005 - Computer programming, programs & data
191
338 - Production
179
621 - Applied physics
166
300 - Social sciences
151
006 - Special computer methods
149
612 - Human physiology
136
571 - Physiology & related subjects
132
900 - History & geography
115
530 - Physics
112
500 - Natural sciences & mathematics
111
004 - Data processing & computer science
105
615 - Pharmacology & therapeutics
101
302 - Social interaction
97
551 - Geology, hydrology & meteorology
95
331 - Labor economics
94
617 - Surgery & related medical specialties
91
570 - Life sciences; biology
88
580 - Plants (Botany)
84
630 - Agriculture & related technologies
78
140 - Specific philosophical schools
68
670 - Manufacturing
66
650 - Management & auxiliary services
64
332 - Financial economics
56
540 - Chemistry & allied sciences
53
613 - Personal health & safety
53
340 - Law
52
158 - Applied psychology
50
577 - Ecology
50
614 - Incidence & prevention of disease
47
384 - Communications; telecommunication
43
381 - Commerce
42
618 - Gynecology, obstetrics, pediatrics & geriatrics
42
572 - Biochemistry
40
001 - Knowledge
39
305 - Social groups
39
306 - Culture & institutions
38
more ...