Classification
UEN - Environmental economy
4
TKB - Civil engineering - buildings
2
YPW - Economy of industry branches
2
DMC - Computer programs
1
EKA - Wind energy
1
EWA - Energy economy
1
GWA - Raw material economy, raw material policy
1
PKP - Radioactivity, electromagnetic transitions
1
USU - Waste recycling
1
YPD - Business economics
1
YPM - National economy
1
YRC - Technology and society
1