Classification
600 - Technology
620 - Engineering & allied operations
14
900 - History & geography
12
700 - The arts; fine & decorative arts
11
000 - Computer science, information & general works
7
333 - Economics of land & energy
7
576 - Genetics & evolution
6
380 - Commerce, communications & transportation
4
330 - Economics
2
340 - Law
2
363 - Other social problems & services
2
530 - Physics
2
304 - Factors affecting social behavior
1
350 - Public administration & military science
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
580 - Plants (Botany)
1