Classification
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TAA - Engineering sciences - reference books
1
TBA - Electronic engineering - general
1
TBB - Electronics - theory
1
TBS - Digital electronics
1
TCL - High frequency engineering
1
TCLM - Magnetic recording, memory cards
1
TCN - Microprocessors
1
TIG - Reliability, safety, quality control
1
TNX - Nuclear propulsion, nuclear explosions
1
YPM - National economy
1