Classification
620 - Engineering & allied operations
702
791 - Public performances
643
700 - The arts; fine & decorative arts
400
900 - History & geography
382
530 - Physics
314
600 - Technology
280
770 - Photography, photographs & computer art
156
621 - Applied physics
153
000 - Computer science, information & general works
148
333 - Economics of land & energy
141
380 - Commerce, communications & transportation
108
777 - [Unassigned]
107
301 - Sociology & anthropology
101
800 - Literature & rhetoric
91
610 - Medicine & health
88
541 - Physical chemistry
87
330 - Economics
77
778 - Fields & kinds of photography
74
363 - Other social problems & services
64
540 - Chemistry & allied sciences
64
300 - Social sciences
63
320 - Political science
63
302 - Social interaction
60
006 - Special computer methods
58
384 - Communications; telecommunication
53
306 - Culture & institutions
50
580 - Plants (Botany)
50
100 - Philosophy & psychology
45
140 - Specific philosophical schools
45
780 - Music
40
667 - Cleaning, color & coating technologies
39
414 - Phonology & phonetics
37
670 - Manufacturing
37
500 - Natural sciences & mathematics
36
576 - Genetics & evolution
33
331 - Labor economics
31
370 - Education
29
660 - Chemical engineering
29
070 - News media, journalism & publishing
28
400 - Language
27
543 - Analytical chemistry
27
547 - Organic chemistry
27
809 - History, description & criticism
26
537 - Electricity & electronics
25
781 - General principles & musical forms
24
658 - General management
23
340 - Law
22
539 - Modern physics
22
200 - Religion
20
305 - Social groups
18
more ...