Bell (instrument)
The bell was a music instrument that comes in various sizes and shapes.

The expression "ring a bell" was a metaphor for memories coming back. ()

A bell was used as a door chime to the Vulcan monastery at P'Jem. Sub-commander T'Pol dragged a large rope next to the door to let the bell work. ()

Bells had been used in courtrooms for centuries. (; ; )

In the past, teachers used small hand-held bells to signal their students that the lesson would begin. Molly and Miles O'Brien gave Keiko a bell as a present for her first day as a teacher on Deep Space 9. ()

A bell was depicted in the logo of Bell System, an Earth organization. ()

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Earth musical instruments