Classification
530 - Physics
700 - The arts; fine & decorative arts
20
000 - Computer science, information & general works
13
620 - Engineering & allied operations
13
363 - Other social problems & services
7
380 - Commerce, communications & transportation
5
500 - Natural sciences & mathematics
5
600 - Technology
5
100 - Philosophy & psychology
4
333 - Economics of land & energy
4
340 - Law
3
550 - Earth sciences
3
576 - Genetics & evolution
3
900 - History & geography
3
170 - Ethics
2
200 - Religion
2
300 - Social sciences
2
320 - Political science
2
400 - Language
2
410 - Linguistics
2
414 - Phonology & phonetics
2
520 - Astronomy & allied sciences
2
551 - Geology, hydrology & meteorology
2
006 - Special computer methods
1
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
1
296 - Judaism
1
304 - Factors affecting social behavior
1
330 - Economics
1
331 - Labor economics
1
370 - Education
1
539 - Modern physics
1
540 - Chemistry & allied sciences
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1