Classification
006 - Special computer methods
1,936
005 - Computer programming, programs & data
829
330 - Economics
647
320 - Political science
414
000 - Computer science, information & general works
372
658 - General management
310
004 - Data processing & computer science
253
700 - The arts; fine & decorative arts
241
620 - Engineering & allied operations
230
600 - Technology
227
500 - Natural sciences & mathematics
194
340 - Law
180
333 - Economics of land & energy
156
363 - Other social problems & services
153
025 - Library operations
150
900 - History & geography
144
519 - Probabilities & applied mathematics
139
610 - Medicine & health
137
621 - Applied physics
113
570 - Life sciences; biology
86
300 - Social sciences
65
380 - Commerce, communications & transportation
59
003 - Systems
58
576 - Genetics & evolution
58
001 - Knowledge
56
745 - Decorative arts
50
302 - Social interaction
49
140 - Specific philosophical schools
48
550 - Earth sciences
45
331 - Labor economics
43
381 - Commerce
41
040 - [Unassigned]
40
518 - Numerical analysis
40
551 - Geology, hydrology & meteorology
39
540 - Chemistry & allied sciences
37
580 - Plants (Botany)
37
370 - Education
32
510 - Mathematics
30
338 - Production
29
622 - Mining & related operations
26
670 - Manufacturing
25
400 - Language
24
581 - Specific topics in natural history
24
720 - Architecture
24
301 - Sociology & anthropology
21
630 - Agriculture & related technologies
21
820 - English & Old English literatures
21
530 - Physics
20
153 - Mental processes & intelligence
19
410 - Linguistics
15
more ...