Classification
TKB - Civil engineering - buildings
19
USN - Waste water treatment
16
UAU - Fire, fire protection, safety at the workplace, prevention of accidents
15
TKD - Air conditioning, refrigeration
11
TEA - Electrical engineering - general
9
DSA - Computer graphics, image/photo editing
8
THA - Mechanical engineering - general
8
YPG - Business management
8
DKAE - Windows
6
TCC - IT - Information and telecommunication
6
CAU - Laboratory and safety engineering in chemistry
5
CT - Chemical methods of materials analysis
5
DUA - Text and document processing
5
TIA - Industrial engineering - general
5
TIE - Process engineering
5
TKA - Civil engineering - general
5
CAN - Chemistry - mathematical methods, computer applications
4
DTAF - MS - Excel
4
HRD - Dosimetry, radiation protection - medical aspects
4
LVE - Food science - general
4
THP - Pressure vessels, boilers, pipes
4
YUS - Other statistical data
4
ASEA - Book production, printing, paper, script
3
CAA - Chemistry - reference books
3
DNA - Computer networks, local area networks
3
DTAE - MS - Access
3
DWID - Multimedia, hypertext
3
THE - Computer aided design and engineering (CAD)
3
UPA - Water - handbooks
3
UPT - Water pollution control and measurement
3
UXL - Radiation protection - general aspects
3
CLE - Combustion, flames, explosions
2
CR - Nuclear chemistry, radiation chemistry
2
CTA - Chemical analysis - comprehensive works
2
CTDK - Chemical analysis of single elements
2
DAE - Information technology - general
2
DGE - Personal computers
2
DMA - Programming
2
DMC - Computer programs
2
DOE - Programming language - BASIC, Turbo BASIC, Visual BASIC
2
DTA - MS - Office package
2
DYK - Image processing
2
FAA - Materials research - reference books
2
HCG - Radiology
2
PAA - Physics - reference books
2
TBA - Electronic engineering - general
2
TGN - Control engineering
2
TGNE - Control engineering - applications
2
THD - Design and construction in mechanical engineering
2
THJ - Machining
2
more ...