Basic Electronics, is written for men of the U. S. Navy and Naval Reserve whose duties require them to have a knowledge of the fundamentals of electronics. Electronics is defined as the science and technology that is concerned with devices involving the emission, behavior, and effect of electrons in vacuums, gases, and semiconductors. Technically speaking, electronics is a broad term extending into many fields of endeavor. Today, electronics projects itself into Navy life at every turn. It aims guns, drops bombs, navigates ships, and helps control engineering plants. It is therefore important to become well informed in basic electronics in order to be able to qualify for any of the many applicable rates or ratings. The electron tube Semiconductor devices Electronic power supplies Tuned circuits Introduction to amplifiers Electron tube amplifier circuits Transistor amplifier circuits Oscillators Special circuits and devices Modulation and Demodulation Transmitters Transmission lines Antennas and propagation Receivers Ranging and navigational systems . Introduction to computers Electronic test equipment