Classification
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TBB - Electronics - theory
6
TCA - Communication science - general
6
TCP - Microcomputers
6
YFF - Industrial safety regulations
6
YPF - Labour science
6
ACA - Languages, dictionaries - general
5
CAD - Chemistry - comprehensive works
5
FAAC - Engineering materials - reference books
5
FAO - Materials science - introductions
5
PDA - Mechanics - general
5
TEB - Electrical engineering - theory
5
TEJ - Electric devices, mechanical devices, magnets, dielectrics
5
TEK - Electric experiments, reliability and technology
5
TGE - Measuring instruments
5
TIA - Industrial engineering - general
5
YPB - Economy - general aspects
5
CTF - Chemical analytical methods
4
DOZ - Programming languages - Other
4
PCA - Thermodynamics
4
PEA - Electromagnetism
4
TCL - High frequency engineering
4
THC - Engineering mechanics and dynamics
4
THQH - Hydraulics
4
YCA - Public law
4
YDA - Administrative law
4
YDE - Financial law, budgetary law
4
YRA - Social studies
4
YRB - Social sciences, sociology
4
AHZ - History of science and technology
3
CEL - Organic synthesis and reactions - general aspects
3
CELC - Organic synthesis
3
CTR - Chromatography
3
DWI - Information management
3
MAE - Mathematics - general interest
3
MAK - Mathematics - formulae, tables
3
MWH - Statistics
3
PJA - Atomic physics - general
3
TBD - Microelectronics
3
TBR - Analog electronics
3
TCN - Microprocessors
3
TGB - Metrology
3
TIF - Industrial ( occupational ) safety
3
TNA - Nuclear engineering - general
3
Y
3
YDMB - Trade law
3
YFD - Public service legislation
3
AHP - Philosophy
2
AXN - Phrase books, language courses
2
CAS - Chemistry - periodic system
2
CBM - Inorganic synthesis and reactions of the elements and their compounds - general aspects
2
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