What does the abbreviation FET stand for?

The abbreviation FET stands for Field Effect Transistor. It is a fundamental semiconductor device widely used for switching or amplifying electrical signals in modern radio equipment. Unlike traditional Bipolar Junction Transistors (BJTs) which are controlled by input current, a FET is a voltage-controlled device. Applying a voltage to the FET's "gate" terminal creates an electric field that changes the conductivity of the semiconductor channel, thereby controlling the main current flow. Distractors like "Fast Electron Transistor" or "Frequency Emission Transmitter" are completely made-up phrases designed to sound like plausible high-tech terminology.