Classification
363 - Other social problems & services
333 - Economics of land & energy
1,240
330 - Economics
1,190
600 - Technology
989
700 - The arts; fine & decorative arts
880
620 - Engineering & allied operations
762
610 - Medicine & health
733
000 - Computer science, information & general works
650
320 - Political science
637
551 - Geology, hydrology & meteorology
591
900 - History & geography
539
380 - Commerce, communications & transportation
456
630 - Agriculture & related technologies
352
140 - Specific philosophical schools
345
580 - Plants (Botany)
274
500 - Natural sciences & mathematics
268
581 - Specific topics in natural history
265
628 - Sanitary & municipal engineering
209
370 - Education
193
576 - Genetics & evolution
182
304 - Factors affecting social behavior
181
540 - Chemistry & allied sciences
177
300 - Social sciences
133
340 - Law
132
658 - General management
123
100 - Philosophy & psychology
113
720 - Architecture
107
800 - Literature & rhetoric
95
414 - Phonology & phonetics
77
364 - Criminology
70
301 - Sociology & anthropology
67
170 - Ethics
57
336 - Public finance
57
200 - Religion
49
612 - Human physiology
47
400 - Language
45
530 - Physics
42
331 - Labor economics
33
361 - Social problems & social welfare in general
31
615 - Pharmacology & therapeutics
29
327 - International relations
21
410 - Linguistics
19
590 - Animals (Zoology)
17
657 - Accounting
13
297 - Islam, Babism & Bahai Faith
12
780 - Music
12
550 - Earth sciences
11
338 - Production
9
344 - Labor, social, education & cultural law
9
350 - Public administration & military science
8
more ...