That's right Scott. "Radio buttons" refers to a series of buttons inside a confining box. When you click (push in) one button the one that was pushed in before pops out. I suspect nobody born later than about 1970 has any idea why that configuration is called "radio buttons." The reason is that in olden times (before about 1970) many radios -- portable radios and car radios especially -- had a series of buttons that operated that way. Push one button in and another one popped out.