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Radio button

From Simple English Wikipedia, the free encyclopedia
4 circular radio buttons reading Wikipedia, Encarta, Britannica, and Otra.
An example of a radio button showing 4 options. Only one can be selected at a time.

A radio button is a type of UI element where only one of more in a group can be selected.

Etymology

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Radio buttons are named after the physical buttons that were used on old radios to select preset stations. When one of the buttons is pressed, the other buttons pop out while leaving the pressed one pushed in.

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