Classification
580 - Plants (Botany)
600 - Technology
3
340 - Law
2
380 - Commerce, communications & transportation
2
610 - Medicine & health
2
620 - Engineering & allied operations
2
700 - The arts; fine & decorative arts
2
900 - History & geography
2
140 - Specific philosophical schools
1
170 - Ethics
1
330 - Economics
1
333 - Economics of land & energy
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1