Reed or Reeds may refer to: Science, technology, biology, and medicine. Reed bird (disambiguation) Reed pen, writing implement in use since ancient times. Reed (plant), one of several tall, grass-like wetland plants of the order Poales. Reed reaction, in chemistry. Reed receiver, an outdated form of multi-channel signal decoding. Reed relay, one or more reed switches controlled by an electromagnet. Reed switch, an electrical switch operated by an applied magnetic field. Reed valve, restricts the flow of fluids to a single direction.
https://en.wikipedia.org/wiki/Reed