Tape recorders

A tape recorder, tape deck, reel-to-reel tape deck], cassette deck or tape machine is an audio storage device that records and plays back sound using magnetic tape, either wound on a reel or in a cassette, for storage. It records a fluctuating signal by moving the tape across a tape head that polarizes the magnetic domains in the tape in proportion to the audio signal.

Ethical issues
Explaining clearly the purpose, limits of use, proposed storage and disposal