Classification
700 - The arts; fine & decorative arts
900 - History & geography
1,921
600 - Technology
1,844
000 - Computer science, information & general works
1,412
333 - Economics of land & energy
1,389
620 - Engineering & allied operations
1,237
610 - Medicine & health
1,217
363 - Other social problems & services
914
330 - Economics
760
140 - Specific philosophical schools
681
320 - Political science
639
380 - Commerce, communications & transportation
633
580 - Plants (Botany)
508
370 - Education
440
400 - Language
424
300 - Social sciences
400
800 - Literature & rhetoric
381
100 - Philosophy & psychology
375
500 - Natural sciences & mathematics
373
540 - Chemistry & allied sciences
359
576 - Genetics & evolution
347
720 - Architecture
319
410 - Linguistics
295
551 - Geology, hydrology & meteorology
274
530 - Physics
269
340 - Law
265
200 - Religion
215
630 - Agriculture & related technologies
213
780 - Music
207
414 - Phonology & phonetics
177
304 - Factors affecting social behavior
152
581 - Specific topics in natural history
152
301 - Sociology & anthropology
151
658 - General management
128
170 - Ethics
121
612 - Human physiology
107
770 - Photography, photographs & computer art
74
615 - Pharmacology & therapeutics
70
361 - Social problems & social welfare in general
51
791 - Public performances
49
297 - Islam, Babism & Bahai Faith
42
120 - Epistemology, causation & humankind
40
520 - Astronomy & allied sciences
22
657 - Accounting
18
550 - Earth sciences
15
398 - Folklore
12
650 - Management & auxiliary services
12
350 - Public administration & military science
11
160 - Logic
9
360 - Social problems & services; associations
9
more ...