Classification
006 - Special computer methods
1,346
610 - Medicine & health
860
004 - Data processing & computer science
836
570 - Life sciences; biology
684
005 - Computer programming, programs & data
556
616 - Diseases
317
572 - Biochemistry
256
621 - Applied physics
252
571 - Physiology & related subjects
221
620 - Engineering & allied operations
163
000 - Computer science, information & general works
148
658 - General management
120
519 - Probabilities & applied mathematics
117
580 - Plants (Botany)
116
003 - Systems
110
660 - Chemical engineering
95
615 - Pharmacology & therapeutics
89
600 - Technology
87
700 - The arts; fine & decorative arts
84
576 - Genetics & evolution
82
612 - Human physiology
82
500 - Natural sciences & mathematics
81
579 - Microorganisms, fungi & algae
80
333 - Economics of land & energy
70
025 - Library operations
65
614 - Incidence & prevention of disease
64
518 - Numerical analysis
59
371 - Schools & their activities; special education
58
530 - Physics
57
581 - Specific topics in natural history
52
363 - Other social problems & services
50
629 - Other branches of engineering
47
630 - Agriculture & related technologies
47
330 - Economics
46
303 - Social processes
42
613 - Personal health & safety
40
140 - Specific philosophical schools
37
611 - Human anatomy, cytology & histology
33
170 - Ethics
32
631 - Techniques, equipment & materials
30
300 - Social sciences
29
540 - Chemistry & allied sciences
29
541 - Physical chemistry
29
599 - Mammals
27
910 - Geography & travel
25
670 - Manufacturing
24
380 - Commerce, communications & transportation
23
900 - History & geography
23
338 - Production
22
362 - Social welfare problems & services
22
more ...