A tape recorder is a device used to record and play back sound. It works by capturing audio on a magnetic tape, which can be played back later. Tape recorders were popular for music, interviews, and personal notes before digital recording became common. These devices typically have buttons for recording, play, stop, and rewind. Some tape recorders also include features like built-in microphones and speakers. While they have largely been replaced by digital audio recorders and smartphones, tape recorders are still appreciated by enthusiasts and collectors for their unique sound quality and nostalgic value.