FM

  1. Short for Frequency Modulation, FM encoding is a method of recording data to a floppy disk or hard disk drive platter. This method of encoding is no longer used today and has been replaced with MFM.
  2. When referring to the radio or an audio signal , FM is short for Frequency Modulation. FM is a method of transmitting a signal of greater quality at ranges of 80 MHz to 108 MHz at a shorter distance when compared to AM.

Also see: AM, Hard disk drive definitions, MFM