Classification
005 - Computer programming, programs & data
5,862
006 - Special computer methods
2,379
658 - General management
2,181
004 - Data processing & computer science
1,584
330 - Economics
1,523
500 - Natural sciences & mathematics
993
610 - Medicine & health
948
000 - Computer science, information & general works
902
620 - Engineering & allied operations
632
331 - Labor economics
602
745 - Decorative arts
517
003 - Systems
400
600 - Technology
308
621 - Applied physics
299
025 - Library operations
287
040 - [Unassigned]
237
333 - Economics of land & energy
215
570 - Life sciences; biology
196
384 - Communications; telecommunication
164
700 - The arts; fine & decorative arts
159
374 - Adult education
155
616 - Diseases
149
332 - Financial economics
142
338 - Production
138
363 - Other social problems & services
134
300 - Social sciences
132
572 - Biochemistry
129
381 - Commerce
124
519 - Probabilities & applied mathematics
118
302 - Social interaction
107
910 - Geography & travel
104
540 - Chemistry & allied sciences
98
670 - Manufacturing
93
380 - Commerce, communications & transportation
92
304 - Factors affecting social behavior
87
551 - Geology, hydrology & meteorology
87
900 - History & geography
87
580 - Plants (Botany)
83
571 - Physiology & related subjects
79
001 - Knowledge
73
140 - Specific philosophical schools
72
650 - Management & auxiliary services
69
615 - Pharmacology & therapeutics
68
320 - Political science
66
510 - Mathematics
63
518 - Numerical analysis
62
370 - Education
55
511 - General principles of mathematics
50
520 - Astronomy & allied sciences
46
576 - Genetics & evolution
45
more ...