Classification
330 - Economics
2,732
620 - Engineering & allied operations
1,225
658 - General management
1,063
333 - Economics of land & energy
975
005 - Computer programming, programs & data
867
363 - Other social problems & services
815
600 - Technology
715
621 - Applied physics
614
616 - Diseases
568
004 - Data processing & computer science
548
700 - The arts; fine & decorative arts
525
610 - Medicine & health
513
000 - Computer science, information & general works
492
571 - Physiology & related subjects
481
006 - Special computer methods
466
551 - Geology, hydrology & meteorology
449
500 - Natural sciences & mathematics
420
577 - Ecology
391
900 - History & geography
365
300 - Social sciences
312
338 - Production
303
670 - Manufacturing
297
580 - Plants (Botany)
276
320 - Political science
253
304 - Factors affecting social behavior
246
570 - Life sciences; biology
241
380 - Commerce, communications & transportation
236
331 - Labor economics
220
370 - Education
217
332 - Financial economics
208
630 - Agriculture & related technologies
196
572 - Biochemistry
195
576 - Genetics & evolution
179
579 - Microorganisms, fungi & algae
177
302 - Social interaction
174
628 - Sanitary & municipal engineering
162
540 - Chemistry & allied sciences
157
612 - Human physiology
156
530 - Physics
151
660 - Chemical engineering
146
629 - Other branches of engineering
140
140 - Specific philosophical schools
127
381 - Commerce
121
745 - Decorative arts
117
581 - Specific topics in natural history
111
624 - Civil engineering
109
550 - Earth sciences
106
650 - Management & auxiliary services
105
515 - Analysis
102
001 - Knowledge
101
more ...