An item in a dialog box that allows the user to select only one option from a group of options.
A small round button that appears in a dialog box. Within a group of related option buttons, you can select only one.
On a form or dialog box, a small circle that the user can click to turn on. Also called a radio button. A check box is usually associated with an option group but can also represent a Yes/No value.
In Client Access for Windows, a circle with associated text that represents a choice. When a user selects the choice, a dot appears within the circle. Within a group of related option buttons, only one button can be selected.
A concrete control that may be used to toggle an application state. A group of option buttons may be used to toggle mutually exclusive application states. See also: check box