Classification
005 - Computer programming, programs & data
13
006 - Special computer methods
13
600 - Technology
13
519 - Probabilities & applied mathematics
9
700 - The arts; fine & decorative arts
9
620 - Engineering & allied operations
8
000 - Computer science, information & general works
7
330 - Economics
7
333 - Economics of land & energy
7
900 - History & geography
6
380 - Commerce, communications & transportation
5
363 - Other social problems & services
4
500 - Natural sciences & mathematics
4
658 - General management
4
720 - Architecture
4
140 - Specific philosophical schools
2
300 - Social sciences
2
320 - Political science
2
370 - Education
2
400 - Language
2
576 - Genetics & evolution
2
580 - Plants (Botany)
2
621 - Applied physics
2
670 - Manufacturing
2
170 - Ethics
1
302 - Social interaction
1
304 - Factors affecting social behavior
1
305 - Social groups
1
342 - Constitutional & administrative law
1
510 - Mathematics
1
518 - Numerical analysis
1
551 - Geology, hydrology & meteorology
1
630 - Agriculture & related technologies
1