2. Từ điển
3. Từ vựng theo chủ đề
4. Vô tuyến

• base station
• hertzian wave
• lobing
• medium frequency
• pager
• radar aerial
• radar antenna
• receiving station
• regenerative amplification
• regenerative circuit
• regenerative feedback
• regenerative amplifier
• scrambler
• scrambling
• selectance
• simplex
• superhet
• subharmonic
• teleometer
• tracking
• transmitter
• transponder
• wavemeter