Classification
005 - Computer programming, programs & data
5,740
006 - Special computer methods
2,331
658 - General management
2,174
004 - Data processing & computer science
1,924
330 - Economics
1,353
500 - Natural sciences & mathematics
989
610 - Medicine & health
944
000 - Computer science, information & general works
899
620 - Engineering & allied operations
638
331 - Labor economics
592
745 - Decorative arts
509
003 - Systems
362
621 - Applied physics
308
600 - Technology
307
025 - Library operations
287
333 - Economics of land & energy
216
570 - Life sciences; biology
204
384 - Communications; telecommunication
163
700 - The arts; fine & decorative arts
159
616 - Diseases
155
374 - Adult education
153
338 - Production
145
332 - Financial economics
141
363 - Other social problems & services
134
572 - Biochemistry
129
300 - Social sciences
126
381 - Commerce
123
519 - Probabilities & applied mathematics
119
302 - Social interaction
106
910 - Geography & travel
103
540 - Chemistry & allied sciences
99
380 - Commerce, communications & transportation
92
670 - Manufacturing
89
304 - Factors affecting social behavior
87
551 - Geology, hydrology & meteorology
87
900 - History & geography
87
580 - Plants (Botany)
83
571 - Physiology & related subjects
79
140 - Specific philosophical schools
72
650 - Management & auxiliary services
71
615 - Pharmacology & therapeutics
69
320 - Political science
66
510 - Mathematics
63
001 - Knowledge
62
518 - Numerical analysis
62
370 - Education
55
511 - General principles of mathematics
50
520 - Astronomy & allied sciences
46
576 - Genetics & evolution
45
579 - Microorganisms, fungi & algae
37
more ...